Along with the aforementioned "Straight Up" singer, Adam Lambert and Katy Perry attended the star-studded LA premiere of "This Is It" on Tuesday. Similar screenings around the world attracted celebs such as J.Lo, Will Smith, Paris Hilton, and more. Lester Cohen/WireImage.com - October 27, 2009
Week in Photos: October 25-31, 2009
Miss any of the hot celebrity stories from last week? Get caught up with the Week in Photos.