Britney Spears and Kevin Federline were together in Calabasas, CA, yesterday to attend Sean Preston's preschool graduation. Kevin brought along his older children to celebrate Sean's special afternoon, and afterward the man of the evening headed off with brother Jayden James, grandpa Jamie, and Britney for dinner from McDonald's. Her boyfriend Jason Trawick skipped out on the big day, but he and Britney were back together this afternoon to run errands. With all the guys in her life, Britney's rumored to still be in contact with one unsavory character from her pas — she's reportedly still in touch with her ex Adnan Ghalib.