She was on a high after scoring a number one in the charts with her debut solo single Young but Tulisa Contostavlos was slammed by Britain's Got Talent viewers for a poor performance on the show.

The X Factor judge took to the stage to sing her new tune at the weekend but many fans of the programme were left unimpressed by the quality of the singer's vocals.

The former N-Dubz star was hoping for a triumphant return to the music scene after her sex tape scandal but Tulisa provoked a mixed reaction from fans.

Taking to Twitter, one wrote: "Oh, Tulisa. Autotune, flat shoes and dad-dancing. I am disappointed."

Another wrote: "Oh oh oh tulisa! Please stop! The dancing, the outfit, everything is wrong!!"

The words "Oh Tulisa" soon became one of the most mentioned phrases on the social networking site as the viewing public voiced its opinion on the performance.

Commenting on the quality of Tulisa's singing, one user left a scathing comment, which read: "Sorry but tulisa is talentless."

However, the singer was feeling positive despite the negative online comments - she later thanked fans for their support after the song raced to the top of the charts on Sunday.

She tweeted: "It's always been a childhood dream of mine to get a No.1 single! Thank you so much to everyone who bought Young. Xx"

@officialtulisa
Tulisa Contostavlos

It's always been a childhood dream of mine to get a No.1 single! Thank you so much to everyone who bought Young. Xx

May 6, 2012 6:27 pm via Twitter for BlackBerry® Reply Retweet Favorite

> IN PICS: TULISA'S STYLE

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• Tulisa's US Adventure

  Tulisa arrived in LA at the beginning of February to record her debut album (Pic: WENN)

• Tulisa's US Adventure

  And only a few days in to her trip, she was doing a Katie Price and getting her hair seen to by top US stylists (Pic: WENN)

• Tulisa's US Adventure

  Getting her extennos sorted. (Pic: WENN)

• Tulisa's US Adventure

  In between recording sessions there was enough time to hit the town. (Pic: WENN)

• Tulisa's US Adventure

  Tulisa was all smiles on the trip despite her recent love split from boyfriend Fazer. (Pic: WENN)

• Tulisa's US Adventure

  But she batted off the attention of admirers at a pre-Grammys party. (Pic: WENN)

• Tulisa's US Adventure

  On her way out of the studio. (Pic: WENN)

• Tulisa's US Adventure

  Tulisa's style offensive was also much talked about as she showed off a stylish American wardrobe. (Pic: WENN)

• Tulisa's US Adventure

  Tulisa is so LA now she wears sunnies in the dark. (Pic: WENN)

• Tulisa's US Adventure

  On Valentine's Day Tulisa headed straight out on the town after leaving the studio. (Pic: WENN)

• Tulisa's US Adventure

  Partying with pals, it was a case of Fazer who? (Pic: Twitter)

• Tulisa's US Adventure

  Never far from her side was her PA and best mate Gareth Varey who also had a tattoo of her name done in his leg during their trip. (Pic: WENN)

• Tulisa's US Adventure

  (Pic: WENN)

• Tulisa's US Adventure

  (Pic: Splash)

• Tulisa's US Adventure

  And bumped into former <em>TOWIE</em> star Mark Wright. (Pic: Twitter)

• Tulisa's US Adventure

  With debut single <em>We Are Young</em> in the can, it was time to film the video. (Pic: Splash)

• Tulisa's US Adventure

  That's a lot of luggage there dear! (Pic: Splash)

• Tulisa's US Adventure

  Getting cheeky on the shoot. (Pic: Splash)

• Tulisa's US Adventure

  And of course Gareth had to get in on the action in the video as Tulisa showed off her curves in a swimsuit. (Pic: WENN)