KEVIN FEDERLINE is planning to put his child custody battle with Britney Spears behind him to ring in the new year (08) in style with his own Las Vegas megaparty. The rapper/dancer will celebrate the start of 2008 on New Year's Eve (31Dec07) in Sin City, where he'll host a party at hip nightclub Tangerine. Last year (06), Federline's ex-wife Spears hosted the New Year's festivities at Pure nightclub in Caesars Palace casino hotel.