Mary-Kate and Ashley Olsen arrived at LAX on Saturday after spending time back in NYC. Ashley's favorite black Nikes probably came in handy as she navigated her way through the airport with her boyfriend Justin Bartha, while Mary-Kate was rolling solo without her man Nate. Ashley and Justin headed on home, but Mary-Kate took a break from enjoying the recession sales to join friends and a canine companion for a meal. She continued into the evening wearing a pair of yellow Santa sunglasses to party the night away at Bardot. The girls went their separate ways for the weekend, but there's sure to be lots of fun Olsen family time in store in the coming weeks.