Kevin's Hip Hop Is A Flop

Kevin FederlineMr Britney Spears Kevin Federline has released his first hip-hop song - and it's already been panned by critics.

Y'all Ain't Ready, a track from album The Truth to be released next year, sees the former backing dancer trying his hand at rapping.

But critics have already snubbed it.

The song goes: "Back then, they called me K-Fed, but you can call me Daddy instead.

"People always asking me when's the release date," the song continues.

Then, apparently mistaking paparazzis for the Italian opera singer Pavarotti, he sings: "Well, baby you can wait and see, until then all these Pavarottis followin' me."

The song was posted briefly on producer Disco D's Web site, and has since been posted elsewhere.

Kevin, 27, and Britney wed last year and had a son in September.

Earlier this month, Brit had some harsh advice for her hubby about his singing career: don't get your hopes up.

Kevin had reportedly brought home music he'd recorded and he played it for Britney, according to In Touch Weekly.

But his efforts were "greeted with hurtful laughter from his superstar wife, who was unimpressed," an insider told the mag.

"She said his debut CD might sell 'a hundred, maybe a thousand' copies if he was lucky.

"Kevin looked really hurt."