An ex-girlfriend of Kevin Federline has said it is highly likely that the wannabe rapper did cheat on his estranged wife Britney Spears.

After Britney filed for divorce from her former backing dancer last month, it has been reported that K-Fed had been enjoying an affair with a porn star during his wild night outs.

Kerri Whittington, who dated K-Fed for three years, has recently claimed that he is just no good.

According to the Sun, she said: �It wouldn�t surprise me if her cheated on Britney Spears.

�He was forever in Vegas and partying with his buddies and girls. There are more than enough stories of him getting close to strippers.�

Britney is currently enjoying her single status and has been taking a leaf out of her hubby�s party, party, party book.