The rapper shoots a commercial in Los Angeles poking fun of himself. Plus: Katie & Posh, Scarlett Johansson and more


A day earlier, Spears's estranged husband Kevin Federline keeps things low-key during an outing in Encino, Calif. Federline, who's battling Spears for custody of their two sons, has an unlikely ally in his corner: ex Shar Jackson, who recently said of the rapper, "He's an amazing dad."