KIIS FM's Jingle Ball 2014 Powered by LINE - Show

Singers Pharrell Williams (L) and Gwen Stefani perform onstage during KIIS FM's Jingle Ball 2014 powered by LINE at Staples Center on December 5, 2014 in Los Angeles, California.
(Dec. 4, 2014 - Source: Jason Merritt/Getty Images North America)