Mel B was booed at America's Got Talent auditions in New Orleans, during her first day on the job as a judge. The singer began to critique a brass band, saying "I don't generally like brass bands," but was booed by the crowd. They also shouted, "Go home," and "No respect," at the Spice Girl.

Nicole Scherzinger made 13 year old X Factor US contestant Rachel Crow cry live on TV. Scherzinger made the decision to take the vote to deadlock, which meant that Crow was eliminated. When Crow heard the results, she collapsed on the stage and started sobbing hysterically - leading Scherzinger to start crying herself.

Sean Conlon is one of those washed up 90s popstars who is so desperate for fame that we're actually a little embarrassed for him. After gaining some notoriety with 5ive, he then pursued a solo career for the next five years, refusing to take part in the 5ive 2006 comeback attempt - but was dropped from Sony before he could release an album. He then auditioned for the first series of The Voice, but wasn't chosen by any of the judges. When 5ive came calling again for The Big Reunion, this time Conlon accepted.

Tulisa appeared on the latest series of The X Factor but has now been dropped, despite the fact that her act Little Mix actually won. After her album The Female Boss was a major flop, X Factor execs decided it wouldn't make sense to have her on the show judging other acts. A source told The Sun, "She simply wasn't up to scratch last year and Simon Cowell had no real option."

Another 90s pop star trying to make it big, Kavana tried to reclaim some form of success by taking part in Grease Is the Word, a competition to find someone to play Danny Zuko in a West End production. After failing to win, he recently auditioned for the new series of The Voice, but was 'gutted' when he didn't get through.

Cheryl Cole was axed from The X Factor US last year after just three weeks, and before the show even aired. She wrote in her autobiography, "Simon didn't even have the guts to phone or send a message warning me what was coming. I was furious... I believed we had a good friendship and I couldn't understand why he hadn't been straight with me." She later sued the first series of the show and received £1.1m.

Geri Halliwell was booed at X Factor auditions during her brief stint as a guest judge. She told a girl band that they couldn't sing, and added, "[But] not everyone in Take That can sing," leaving fellow judge Gary Barlow irritated. The crowd then booed her for the Take That jibe.

Jo O'Meara had one of the most disastrous attempts to revive her career, which started to flag after S Club broke up, by appearing on Celebrity Big Brother. The star made racist remarks about fellow housemate Shilpa Shetty, and later said in an interview that the hate and abuse she received following the show caused her to consider suicide.

Preston from The Ordinary Boys went on Celebrity Big Brother, probably so people would actually have heard of The Ordinary Boys. He ended up cheating on his girlfriend in order to hook up with fellow contestant Chantelle, who he later married, and then divorced. He also got spectacularly angry on an episode of Never Mind the Buzzcocks when they made fun of Chantelle, and walked off the show. He tried reforming the band two years ago, but they soon faded back into obscurity.