The sultry singer gets the crowd going during a concert Down Under. Plus: Hailee Steinfeld, Christina Milian & Violet, Gwyneth Paltrow, Sandra Bullock and more


George Clooney puts the squeeze on Jon Stewart as Gravity costar and close pal Sandra Bullock stays nearby Thursday during the USC Shoah Foundation Institute's Ambassadors for Humanity Gala, which honored Clooney for his activism, at the American Museum of Natural History in N.Y.C.