Get the hottest celebrity news in pictures, including Ashlee Simpson, Julia Roberts, The O.C. stars and more. By Janice Morris

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BEST USE OF FREQUENT FLIER MILES

Mary-Kate Olsen, 18 (left), was back to her busy New York life after a week attending to "business matters" in L.A. and enduring rumors of an eating disorder relapse. She rejoined twin Ashley for a sushi dinner Oct. 24 at Nobu Next Door, missed a writing seminar the next day and that night was on the dance floor at hotspot Butter. Mary-Kate's rep insists, "She's doing great," and has no plans to drop out of New York University.