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


Dressed to impress in the front row, Dita von Teese, Katy Perry, Emma Watson and Zoe Saldana all join forces Monday at the Christian Dior runway show in Paris. Hanging behind in the second row: Gym Class Heroes singer Travis McCoy, who gave girlfriend Perry a promise ring over the summer.