But as the two came to the end of their stints on Celebrity Fit Club on U.S. TV the pair gave the producers the ending they’d hoped for by finally hugging and making up.
Apology: Celebrity Fit Club star Kevin Federline finally hugged and made up with Shar Jackson for leaving her for Britney Spears
In July 2004, Jackson, 33 , said Federline’s relationship with Spears ‘wasn’t like just breaking up a relationship. It was like breaking up a family.’
Their daughter, Kori, was just approaching her second birthday, while baby Kaleb was still in the womb.
The apology from K-Fed, 32, came during the final confessional session – he insisted he had become ‘the silent mute in the corner’ during the break-up on advice of lawyers.
Of course, his own relationship with Spears didn’t last all that long, although it did produce two more children.
During the close of the show, Federline left his ex-fiancée in tears as he admitted: ‘I’ve seen her go through so much stuff before the show, and I’m a big part of that.’
Emotional: Shar was taken aback by her ex-fiance’s apology
Closure: K-Fed’s former fiancee says he has been a different man since they separated and this was the first time she’d seen the man she fell in love with
He added: ‘I know I’ve caused you a lot of pain. I’ve been really selfish. I guess I got so wrapped up in all this other s*** that I never really got a chance to sit back and apologise to you.
‘I really do want you to know that I am sorry.’
Shar admitted she was left in a bad way by Kevin and Britney’s relationship, and told him: ‘I felt like the whole relationship was not real by the way you handled it ending – and that killed me.’
‘That wasn’t it. At all,’ Kevin insisted.
‘I think I got caught up in my own selfishness. When you’re in a moment like that you don’t really think about anyone else.
Weight loss: Federline managed to achieve his goal of losing 30 pounds during his time on the show
‘It’s just been a wild ride the last few years and I’m sorry that you got a big s*** at the end of that stick.’
Shar told him: ‘That meant the world to me.’
Marriage: Kevin Federline and Britney Spears married in 2004
They then hugged and, rubbing her back, Kevin told her: ‘I just want the best for you.’
Shar said it was the first time she has seen the Kevin she knew since they split up.
‘For the past few years I felt, I don’t know who this dude is inhabiting Kevin’s body, but that’s not him. But at that moment I saw Kevin and thought: “That’s awesome”.’
Shar started the show at 146 pounds – and ended at 128 pounds, down 18 pounds. Kevin started at 232 pounds and lost 30 pounds, his target.
Bobby Brown was his typical rebellious self up until the bitter end of the show.
The R&B star, 41, only had to lose 20 pounds, but he lost 11 and gained one.
In a previous weigh-in he had agreed that for every pound he was under he would donate $1000 to charity.
He didn’t like that idea so he gave Dr Ian a blank check and walked out shouting “Kiss my a**!” on the way.
Harvey Walden tried to stop Bobby from leaving the show but Bobby continued to lash out with more profanity.
‘Don”t walk out like that, stand up like a freaking man then walk out.’ he said.
After Bobby returned, Dr Ian gave him the benefit of the doubt and gave him 60 days to get the final nine pounds.
The winner was Project Runway’s Jay McCarroll who lost 40 pounds, ten over his target.
