LONDON: Kevin Federline, the estranged husband of pop star Britney Spears, is reportedly going back into the ring with World Wrestling Entertainment (WWE) to help pay his legal bills. The aspiring rapper wrestled WWE star John Cena in October to help promote his debut album Playing With Fire and received a resounding chorus of boos from the audience, said contac-tmusic.com. Spears filed for divorce from Federline in November and he has since had to downgrade his lavish lifestyle. Federline will have a rematch with Cena on New Year’s eve.