Kevin Federline cried after musical debut

Kevin Federline claims his son Sean Preston has said his first word - "dada"
The fledgling rapper insists his 11-month-old son called him "dada" while
wife Britney Spears was not around.

However, Britney - who is pregnant with the couple's second child - is
apparently not convinced Sean said his first word.
A source told Britain's Daily Mirror newspaper: "Britney isn't convinced,
but is happy to see Kevin paying so much attention to Sean."
Meanwhile, Kevin made his musical debut at America's Teen Choice Awards
earlier this month.
Despite much hype surrounding the track, the former dancer's performance of
his first rap single 'Lose Control' was slammed by critics and labeled a
"joke".

Kevin Federline publicly put on a brave face , but insiders tell Us Weekly he’s devastated.

“He was actually crying,� says a source. The next day, at home in Malibu, California, wife Britney Spears, 24, “also cried for him…She didn’t leave him alone all day,� says the source.

According to another source, though, the pair were “thrilled� because the performance landed K-Fed another gig: In October, he’ll guest-star on CBS’s CSI as the leader of a violent gang. Dustin Abraham, the episode’s writer, tells Us, “He has this cockiness and confidence that I like. But I told him…he needs to be the guy that you hate. It’s the perfect role.� Federline’s approximately five days of shooting began August 24.

“There wasn’t a lot of acting – more beating [people up],� Abraham says. “I thought he was awesome.�