The newly engaged star shows off a diamond sparkler at the Met's Costume Institute Gala in N.Y.C. Plus: Mariah Carey, Ashton & Demi, Clive Owen and more

8 of 20

SHOWING HIS METAL

A beaming Robert Downey Jr. enjoys the best seat in the house, sitting courtside as the Los Angeles Lakers face off against the Utah Jazz Sunday at the Staples Center. And the actor had plenty to smile about: apart from the Lakers' win, his film Iron Man grossed more than $100 million over the weekend.