Kevin Federline launched a
bitter attack on his estranged wife Britney Spears during a concert on Sunday
night - by screaming out "f**k Britney' and giving the finger to the singer.
The rapper was playing at The Norva in Virginia when he made the
foul-mouthed gesture, according to British newspaper Daily Star.
The Toxic singer wasn't in the crowd, but the public outburst is sure to
leave the pop princess fuming.
Spears filed for divorce last week, seeking custody of the couple's two young
sons Sean Preston, 14 months, and Jayden James, two months.
Federline filed a response, also seeking sole custody of the kids.