Kevin Federline, the ex- Mr. Britney Spears, showed up at the Madden NFL 09 video game launch alone last night.  It’s a good thing he didn’t drag along the kiddos because there was a lady friend there in need of chatting up to - K-Fed’s ex and mother of two of his children, Shar Jackson.

Party spies report that the two were partying at the same VIP table and acted “like a couple” while everyone else was busy playing xBox.   Once the party started, however, the two stayed apart as not to draw attention.

What is it about Kevin that makes his exes still want his sorry ass after they’ve parted ways?  We may never know.