Britney Spears has not only been dumped by her lawyer, Laura Wasser, but also by her manager, Jeff Kwatinetz, after her lackluster performance at the MTV awards last week. Prior to resigning, Wasser negotiated a 50/50 custody split with Kevin Federline, but Federline is now asking for 70/30. Federline threw a birthday party for two-year-old Sean Preston (born September 14, 2005) and Jayden James, 1 (born September 12, 2006), on the same day Britney was performing at the VMAs. Britney’s parents showed up, along with the boys’ half siblings, Kori (5) and Kaleb (3) on their dad’s side. They watched Britney on the show, then Federline turned it off when Sarah Silverman started cracking jokes about Britney and the boys. Celebrity attorney Mel Goldsman has taken over Britney’s custody case. No one has yet stepped up to offer their management services, however.