May 20 - May 26, 2012 (127 images)

Model Amber Rose and rapper Wiz Khalifa arrive at the 2012 Billboard Music Awards held at the MGM Grand Hotel in Las Vegas, Nevada on May 20, 2012. UPI/Jim Ruymen

Cheryl Cole arrives on the red carpet before the screening of the film "Amour" during the 65th annual Cannes International Film Festival in Cannes, France on May 20, 2012. UPI/David Silpa

Musician Stevie Wonder appears backstage with the Icon Award he was honored with at the 2012 Billboard Music Awards, held at the MGM Grand Hotel in Las Vegas, Nevada on May 20, 2012. UPI/Jim Ruymen

U.S. President Barack Obama (L) and NATO Secretary General Anders Fogh Rasmussen along with other NATO heads of state walk out for a group photo before a dinner at Soldier Field during the 2012 NATO Summit on May 20, 2012 in Chicago. UPI/Brian Kersey