Hough is downright giddy with Seacrest in L.A. Plus: Channing Tatum, Madonna, Kim Kardashian, Chris Hemsworth, Rihanna and more

SHORTS STORY

Work it! Rihanna shows some serious leg while filming a cameo Thursday in New Orleans for Seth Rogen's directorial debut, End of the World, a comedy about the apocalypse's effect on Hollywood.