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
Ashton Kutcher and wife Demi Moore are fashionably coordinated while stepping out Sunday in New York City. Kutcher is in town promoting his latest movie, What Happens in Vegas, with Cameron Diaz.