Girls Aloud singer Sarah Harding has made a complaint to cops following an angry bust-up with her new boyfriend in a hotel room in Austria.

The 30-year-old had a troubled 2011 which left her in rehab for alcohol addiction and depression, but the star is facing fresh issues after being hospitalised following a row with her new beau, known only as Theo, during an Austrian skiing holiday.

Speaking to The Sun, a witness spoke of a 'terrible fight' erupting in the early hours of the morning, despite Sarah appearing happy with Theo throughout the day.

The hotel guest said: "There was banging and screaming and a few guests came out into the corridor.

"It sounded like a terrible fight. By the early hours people had had enough and someone called the police.

"It was obviously a very serious tiff indeed. There was a lot of screaming and shouting."

The star, who was staying at the Hotel Schloss Matzen near Innsbruck, was allegedly left bruised with swollen eyes and a bandage on her arm.

The source added: "Sarah was taken to hospital because she was hysterical after the row. She was crying and screaming and clearly in a lot of distress."

The star flew back to her Buckinghamshire mansion last night and told reporters that she'd had the "week from f**king hell" and has since made a formal complaint to police.

Pals had warned Sarah against getting back into a relationship so quickly after her split with her DJ fiance Tom Crane.

A source said: "She has been through a lot and met Theo when she was getting her life back on track after rehab. But it's difficult telling Sarah what to do."

CELEB REVIEW OF THE YEAR 2011:

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• Review Of The Year - January

  2011 kicked off with some good news as Girls Aloud's Sarah Harding announced her engagement to long-term boyfriend Tom Crane after he popped the question on a New Year's break in the Maldives.

• Review Of The Year - January

  The late Jade Goody's husband Jack Tweed was arrested along with pal Mark Wright after they were involved in a scuffle outside Mark's new bar. After spending a night in the slammer, Jack admitted to the claims, while Mark was proven innocent in court.

• Review Of The Year - January

  There was excitement in celebsville when Victoria and David Beckham announced they were expecting their fourth child. After much speculation, the Beckhams told the world they were having a baby girl and Harper Seven Beckham was then born on 10th July, becoming sister to Brooklyn, Romeo and Cruz.

• Review Of The Year - January

  In the least surprising news of 2011, the much publicised marriage of Katie Price and Alex Reid came to an abrupt end after less than a year of martial, er, bliss.

• Review Of The Year - February

  There was tragic news for <em>Britain's Got Talent</em> judge Amanda Holden, after her baby boy was stillborn at seven months. After returning to work on <em>BGT</em> and a starring role in <em>Shrek: The Musical</em>, in August Amanda announced she was expecting a second baby girl.

• Review Of The Year - February

  Adele stormed the Brit Awards with her stunning and moving performance of <em>Someone Like You</em>, which was propelled straight to number one after the ceremony. Although she wasn't eligible for any awards in 2011, we're expecting massive things for the Brits 2012.

• Review Of The Year - February

  Charlie Sheen appeared to suffer a breakdown after a series of confusing incidents, which later led to his axing from comedy <em>Two And A Half Men</em>. But we will never forget the tiger blood. Hashtag winning!

• Review Of The Year - February

  A definite contender for the strangest story of 2011 saw Ashley Cole accidently shoot a work experience student at Chelsea's training ground after he was messing about with a gun. As you do.

• Review Of The Year - March

  A heartbroken Dougie Poynter checked himself into the Priory after he struggled to cope with his break-up from The Saturday's Frankie Sandford and her new relationship with footballer Wayne Bridge.

• Review Of The Year - March

  She's at it again! Katie Price bagged herself a new man in the shape of toy boy and Argentinian model Leandro Penna. Despite getting inkings of each other's names and declaring they were madly in love, it all ended in October. Speaking to a tabloid, Leandro revealed they spent most of their relationship having sex as neither of them could understand each other. TMI Leandro.

• Review Of The Year - April

  Tara Palmer-Tompkinson was on the hunt for a new nose after hers began to look as if it was making a bid for freedom from her face. She'd previously had it rebuilt after it was ravaged by her old &pound400-a-day cocaine habit, but small knocks left the delicate cartilage bent and crooked.

• Review Of The Year - April

  In what was possibly the longest labour ever in the history of celebrity babies, Holly Willoughby finally gave birth to her second child Belle Baldwin. We still kind of miss Phillip Schofield giving us Twitter updates on the state of Holly's uterus. Not.

• Review Of The Year - April

  Catherine Zeta-Jones made the courageous decision to speak out about her battle with bipolar disorder.

• Review Of The Year - April

  After months of hype, speculation, and royal related hoity toity, Prince William got hitched to Kate Middleton at Westminster Abbey. Many men around the world will also remember the occasion as when they were first introduced to Pippa Middleton's arse.

• Review Of The Year - May

  Cheryl Cole's dream had finally come true - she'd bagged herself a role as a judge on one of the most hyped American TV shows of all time, <em>The X Factor USA</em> (let's not mention the ratings disaster though). But after the lion-hair/p'orange combo she rocked up in to the first day of filming, it was all down-hill from there... She was unceremoniously dumped from the show two weeks later with Pussycat Doll Nicole Scherzinger installed in her place. Cheryl came back to the UK with her tail between her legs and straight into the arms of her love-rat ex Ashley...

• Review Of The Year - May

  Ryan Giggs found himself named in the Imogen Thomas/ premier league footballer affair scandal despite obtaining a super-injunction to keep his identity a secret. More controversy followed after it was revealed he'd also been having it off with his brother Rhodri's wife Natasha. Footballers, eh?

• Review Of The Year - May

  Former <em>EastEnders</em> star Natalie Cassidy spilt from her fiance Adam Cotteral after the pair were involved in a domestic incident were Adam was claimed to have hit Natalie with a slipper and punched a microwave.

• Review Of The Year - May

  After Dannii Minogue announced she had quit <em>The X Factor</em>, and with Simon busy with the US version and Cheryl still licking her wounds from her US axing, it was all change on the judging panel. It was revealed that long-standing judge Louis Walsh would be joined by N-Dubz singer Tulisa Contostavlos, Beyonce's mate Kelly Rowland and the original manbander Gary Barlow.

• Review Of The Year - June

  Wayne Rooney showed off the results of his &pound30,000 hair transplant.

• Review Of The Year - June

  There was double joy for Lily Allen as she tied the knot to Sam Cooper in a private ceremony in Gloucestershire - she announced to guests she was having an ickle baby!

• Review Of The Year - June

  <em>X Factor</em> judge Louis Walsh found himself at the centre of allegations he had sexually harassed a young male during a night out. After weeks where Louis admitted he had thought about taking his own life, the man retracted his claims and admitted they were false.

• Review Of The Year - June

  Glastonbury Festival was rocked by a certain US megastar when Beyonce wowed the 175,000 strong crowd with her unbelievable vocal range, nifty dance moves and enviable thighs. Little did everyone know, she was hiding some VERY big news...

• Review Of The Year - July

  <em>TOWIE</em> may have been off-air but the Essex lot were far from removed from our conciousness as relationship dramas hit our favourite reality TV show gang. Both Lauren Pope and Kirk Norcross and Sam Faiers and Joey Essex called time on their romances during the summer. But there was good news as James Argent and Lydia Bright finally got their acts together and rekindled the love. Ahhhh.

• Review Of The Year - July

  What do they say? Once a cheat, always a cheat. And that was a lesson Cheryl Cole had to learn the hard way. After allegedly getting back with her ex-hubby, she was left broken hearted once again as an air stewardess came forward to tell the world she had been having it off with Ashley while he was supposed to be getting back with our Chez. We won't say we told you so...

• Review Of The Year - July

  The marmite news of the year - you either rejoiced or recoiled at the news Steps were to reform for a special TV documentary to mark the 10th anniversary of their split. Despite tears, tantrums (and Claire's weight gain) the group put their differences behind them and announced plans to release a Greatest Hits album and subsequent arena tour.

• Review Of The Year - July

  After a shambolic performance in Belgrade in June where she appeared drunk on stage, concerns for Amy Winehouse's well-being were sparked once more. Everyone's worst fears were realised when the singer was found dead at her flat in Camden on 23rd July 2011, aged 27. An inquest into her death later announced a verdict of 'death by misadventure' as it was revealed that she was five times over the legal drink-driving limit at the time she died.

• Review Of The Year - August

  Kate Winslet was hailed as a hero during her holiday at Richard Branson's home in Necker Island. The Hollywood star rescued his mother from a house fire that swept through the villa where 20 other guests were staying.

• Review Of The Year - August

  That's how to make an entrance! Beyonce revealed she was with child when she turned up to MTV's Video Music Awards sporting a cute little bump. The world is now awaiting the birth of what will undoubtedly be the coolest baby ever.

• Review Of The Year - July

  Never the wallflower, Lady Gaga didn't exactly keep it low key at the VMA's either, turning up dressed as her male alter-ego Joe Calderone. But the defining moment of the night was as Gaga, sorry Joe, presented Britney Spears with her Lifetime Achievement Award, she stole Britters' limelight by trying to snog her.

• Review Of The Year - August

  <em>EastEnders</em>' star Jessie Wallace was left heartbroken and redfaced when it emerged her fiance Vince Morse had sent nudey snaps of her to an ex-girlfriend begging for a threesome. As guests turned up unaware to their nuptials, they were told the wedding was off and Jessie fled the country.

• Review Of The Year - September

  <em>The Only Way Is Essex</em>'s golden couple Mark Wright and Lauren Goodger broke off their engagement. To this day we still don't know exactly what happened to end their on/off 10 year romance, but Mark was later back in the arms of exes Lucy Mecklenburgh and Sam Faiers...

• Review Of The Year - September

  David Walliams overcame all the odds (and a bout of Thames tummy) to complete his 140 mile swim of the River Thames for Sport Relief.

• Review Of The Year - October

  After a whirlwind romance, Alex Reid got down on bended knee and popped the question to former <em>Celebrity Big Brother</em> winner Chantelle Houghton live on TV. Of course she said yes, and the following month the couple announced they were expecting a miracle baby together, after Chantelle had previously been told she would be unable to conceive naturally. And inevitable reality TV show is set to follow in the new year.

• Review Of The Year - September

  With a new blonde 'do, our Cheryl headed out to Afghanistan to do her bit for the troops as part of the Pride of Britain Awards. But the nation's sweetheart got down and dirty with the lads and was proved her credentials as a solider, taking part in mock gun battles. It was even reported that a young solider had caught her eye while she was out there.

• Review Of The Year - September

  Rihanna was back to her controversial best when she hit the headlines for annoying an Irish farmer by dancing topless in his field while shooting the video for <em>We Found Love</em>.

• Review Of The Year - October

  Sarah Harding and Frankie Sandford proved that being a celebrity can take it's toll when they both checked into clinics. Sarah was in rehab battling problems with alcohol in the wake of her split from fiance Tom Crane. Meanwhile, Frankie took time out from her commitments with The Saturdays, spending time in a clinic for unconfirmed reasons.

• Review Of The Year - October

  <em>Xtra Factor</em> presenter Caroline Flack and One Direction's Harry Styles set tounges wagging after they shared a cheeky snog at an <em>X Factor</em> bash. Rumours Caroline was secretly dating co-presenter Olly Murs were thrown out of the window after the revelations with Harry. And while neither Harry or Caroline have spoken out, they are said to be rubbing belly buttons after he was pictured leaving her house after a 'sleepover'.

• Review Of The Year - October

  In what was dubbed 'bully-gate', the proverbial hit the fan on <em>The X Factor</em> when Tulisa and Louis accused contestant Misha B of being a bully, after alleged comments she made to other hopefuls. Misha's mentor, Kelly Rowland was none too pleased at the accusations and had a full-on spat with Tulisa. Kelly then missed the following week's show after falling ill - mamma had a sore throat y'all!

• Review Of The Year - October

  Kim Kardashian and Kris Humphries tried to set a record for the shortest ever celeb marriage when then announced they were splitting after 72 days of married life. But Kim swears the multi-million dollar wedding was not a publicity stunt...

• Review Of The Year - November

  Justin Bieber found himself at the centre of a paternity lawsuit after 20-year-old fan Maria Yeater claimed that he had fathered a child with her after an alleged 30 second backstage encounter. Justin declared he would take a paternity test to prove the claims were untrue, but there was no need, as after days of speculation, Maria withdrew her case and admitted he was not the father after all.

• Review Of The Year - November

  Jaws hit floors when Dawn French arrived at a celebrity bash looking like a shadow of her former self. The comedian showed off her new skinny frame after shedding over four stone, and is still continuing to diet.

• Review Of The Year - November

  After endless weeks of boozing and countless bedroom conquests, <em>X Factor</em> wild child Frankie Cocozza was axed from the show after admitting he had taken cocaine on a night out. The headlines preceded to write themselves as Ameila Lily returned to the competition in his place.

• Review Of The Year - November

  It was all over for one of Hollywood's golden couples as Demi Moore announced she was to divorce husband Aston Kutcher after it was claimed he had cheated on her with a 23-year-old blonde on their wedding anniversary.

• Review Of The Year - November

  After terrible year for <em>Daybreak</em> where viewing figures still continued to disappoint, presenters Christine Bleakley and Adrian Chiles found themselves on the scrapheap after they were axed from the flop breakfast show. It wasn't all bad news though as Christine was announced as Holly Willoughby's replacement on <em>Dancing On Ice</em>, after she departed the series to host <em>The Voice</em>.

• Review Of The Year - December

  After a bad start to the year, McFly's Dougie Poynter ended it on a high by being crowned King of the Jungle, beating <em>TOWIE</em>'s Mark Wright to the <em>I'm A Celebrity...</em> crown.

• Review Of The Year - December

  Little Mix made <em>X Factor</em> history when they beat Marcus Collins to win the talent show. In the show's eight years, they became the first girl group to make the final, and the first group ever to win. Their debut single <em>Cannonball</em> hit the number one spot, but missed out on the coveted Christmas number one to the Military Wives.

• Review Of The Year - December

  2012 is certainly looking bright for the McFly boys with two reality show wins under their belts. Fresh from Dougie's jungle triumph, drummer Harry Judd became the ballroom champ on <em>Strictly Come Dancing</em>.