The polka-dot-wearing actress makes a cheerful arrival to the Late Show with David Letterman. Plus: Blake Lively, Gavin & Gwen, Nick Jonas and more

SITTING PRETTY

Teen star Selena Gomez enjoys being pampered during a last-minute touch-up before her Monday appearance on the Today show in New York City, where the actress promoted her direct-to-DVD romantic comedy Another Cinderella Story.