Enjoy the pictures of Singers Rihanna (2nd L) and Katy Perry (3rd L) with cast members Cheri Haight (L) and Jennifer Haight (R) appear backstage after the singers attended "KA" by Cirque du Soleil at the MGM Grand Hotel/Casino September 18, 2010 in Las Vegas, Nevada.

Enjoy the pictures of Singers Rihanna (2nd L) and Katy Perry (3rd L) with cast members Cheri Haight (L) and Jennifer Haight (R) appear backstage after the singers attended "KA" by Cirque du Soleil at the MGM Grand Hotel/Casino September 18, 2010 in Las Vegas, Nevada.

Source: David Becker/Getty Images North America