Mary-Kate Olsen arrived at LAX without her other half by her side on Saturday. It's certainly not unusual to see the twins by themselves anymore and rumor has it that the two are insisting on doing all interviews separately while promoting their new jewelry line. MK and Ashley have been business partners almost as long as they've been sisters and are certainly their own different women these days, but I still have a hard time believing the rumors that there's a real rift between the girls. (It's not like we didn't see them together just days ago.) Seems a bit blown out of proportion and as MK herself said unless you're a twin, you can't understand it.