L.A. natives Ashley (left) and Mary-Kate Olsen are true New Yorkers now: The sisters cheer on the Knicks on Saturday at Madison Square Garden as they battle the Boston Celtics. Unfortunately, their twin power wasn't enough to help the Knicks win – they lost 107-73.
Meanwhile, O.C. star Mischa Barton and boyfriend Brandon Davis snuggle courtside Sunday at the Los Angeles Lakers-Atlanta Hawks game at L.A.'s Staples Center. The couple watched their home team shoot and score to victory, 106-90.
While out with husband Kevin Federline (not pictured) on Sunday, Britney Spears pens another "letter of truth" – this one to shoppers in West Hollywood. The singer, who also recently posted a note on her Web site saying she's focusing on "myself, my husband, Kevin, and starting a family," left her mark on a store's message board.
Ellen DeGeneres perfects her New York City vendor's smile Friday as she tries to impress The Donald with her hot-dog-slinging skills during an Apprentice-style task for her talk show. She'll go head-to-head with Trump in his boardroom later this month.