Robbie Williams has spoken out about his fears for Justin Bieber.

The Take That star, who suffered from drug issues and alcoholism in the past after shooting to fame at the age of 16, reportedly told The Sun 18-year-old Bieber is ill-equipped for the obstacles ahead.

robbie williams

Robbie Williams

He said: “It’s inevitable that someone like Justin Bieber will hit a hard time. You hear about everybody going, ‘You’re sh**’. And you go ‘f***, I’m sh**, I’d better go and do something else’. And it gets to you.”

With his troubled early years behind him, Williams is celebrating his 39th birthday with his wife Ayda Field and baby daughter Teddy this Wednesday.

justin bieber

Justin Bieber

Having sold over 70 million records worldwide, Williams is now the best-selling British solo artist in the UK.

The 'Angels' singer, who boasts seventeen BRIT Awards (more than any other artist), last year proved he's not slowing down yet, when he announced a new European tour.

The pop legend will play a 15-date stadium tour, starting in Manchester on 19 June 2013, to support his number one album 'Take The Crown' and said he is determined to put his "stamp down" on pop history before he turns 40.

For his first solo tour in over six years, he will be joined by fellow 'cheeky' singer Olly Murs.

At a press conference, Williams said: "I'm buzzing. I'm ready to go... I'm at a place in my career where it's time to put my foot down and go, 'This is what I do.'

"I'm nearly 40 and I don't know how many times around I'll get given this opportunity. I want to go and seal my place in pop history and go off and deliver a tour of great magnitude, while I'm still capable of doing it."

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  • Musicians Usher, left, and Justin Bieber arrive at the 22nd Annual Kids' Choice Awards on Saturday, March 28, 2009, in Los Angeles. (AP Photo/Chris Pizzello)

  • Musicians Usher, left, and Justin Bieber arrive at the 22nd Annual Kids' Choice Awards on Saturday, March 28, 2009, in Los Angeles. (AP Photo/Chris Pizzello)

  • Justin Bieber performs at the Pepsi Superbowl Fan Jam Concert in Miami Beach, Florida.

  • Teen pop sensation Justin Bieber performs with Drake at the Juno Awards Sunday, April 18, 2009

  • Canadian singer Justin Bieber performs live in concert during the NRJ showcase on the 1st floor of the Eilffel Tower in Paris, France

  • Paris Jackson and Justin Bieber during a ceremony honoring the late Michael Jackson with Hand and Footprints in Cement, held at Grauman's Chinese Theatre, on January 26, 2012, in Los Angeles.

  • Canadian singer Justin Bieber performs live during a showcase at the Universale Headquaters in Paris, France.

  • Justin Bieber arrives at the Grammy Awards on Sunday, Jan. 31, 2010, in Los Angeles. (AP Photo/Chris Pizzello)

  • Justin Bieber poses for photographs before a personal appearance at HMV in Westfield, west London. Over 1,500 fans turned up to try and meet the singer.

  • Justin Bieber performs live on stage at the Hard Rock Cafe in Las Vegas.

  • Canadian singer-songwriter Justin Bieber visits LIVE@Much in Toronto on Monday, Oct. 5, 2009. The Canadian Press Images/Christian Lapid

  • Justin Bieber and his girlfriend Selena Gomez

  • Justin Bieber with one of his idols, Sean Kingston

  • Justin Bieber with one of his many lady-friends, Kim Kardashian

  • Bieber fever

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  • Justin Bieber

  • L-R: Smokey Robinson, Prince Michael Jackson Jr., Prince Michael Jackson II aka Blanket, Paris Jackson and Justin Bieber during the Michael Jackson Hand and Footprint Ceremony with the children of Michael Jackson making the impressions using shoes and sequined glove once worn by Michael Jackson, held at Grauman's Chinese Theater in Hollywood, California on January 26, 2012.

  • Canadian singer Justin Bieber arrives at the Cannes festival palace, to take part in the NRJ Music awards ceremony, in Cannes, southeastern France, Saturday, Jan. 28, 2012. (AP Photo/Lionel Cironneau)

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