Arnett and Applegate share a laugh at a Beverly Hills event. Plus: Beyoncé & Jay-Z, Christina Hendricks, Justin Timberlake and more

COLOR HER HAPPY

A rainbow-haired Lady Gaga pays her respects to Japan's favorite bow-wearing kitty as she arrives in Tokyo on Tuesday – the singer, after all, is a huge fan of Hello Kitty and shares her bed with a Hello Kitty doll.