Photos: Jingle Ball 2014

5 Seconds of Summer performs at KIIS-FM’s annual Jingle Ball concert at Staples Center in Los Angeles. (Luis Sinco / Los Angeles Times)

Dec. 7, 2014 11:25 PM PT

KIIS-FM’s Jingle Ball concert for 2014 was held at Staples Center in Los Angeles.

Nick Jonas and Demi Lovato perform at KIIS-FM’s Jingle Ball concert at Staples Center in Los Angeles. (Luis Sinco / Los Angeles Times)

Pharrell performs with Gwen Stefani at KIIS-FM’s annual Jingle Ball concert at Staples Center. (Luis Sinco / Los Angeles Times)

Sam Smith performs Friday night during KIIS-FM’s Jingle Ball concert at Staples Center. (Luis Sinco / Los Angeles Times)

Shawn Mendes performs at KIIS-FM’s Jingle Ball concert at Staples Center. (Luis Sinco / Los Angeles Times)

Becky G performs at KIIS-FM’s annual Jingle Ball concert. (Luis Sinco / Los Angeles Times)

Kiesza performs at KIIS-FM’s Jingle Ball concert. (Luis Sinco / Los Angeles Times)

Jessie J and Ariana Grande perform at KIIS-FM’s Jingle Ball concert. (Luis Sinco / Los Angeles Times)

Ariana Grande performs at KIIS-FM’s Jingle Ball concert at Staples Center. (Luis Sinco / Los Angeles Times)

Ariana Grande, right, performs with Big Sean at KIIS-FM’s Jingle Ball concert. (Luis Sinco / Los Angeles Times)

Iggy Azalea performs with Charli XCX at KIIS-FM’s Jingle Ball concert. (Luis Sinco / Los Angeles Times)

Iggy Azalea performs with Rita Ora. (Luis Sinco / Los Angeles Times)

Iggy Azalea performs at KIIS-FM’s Jingle Ball concert at Staples Center. (Luis Sinco / Los Angeles Times)

Taylor Swift performs at KIIS-FM’s Jingle Ball concert. (Luis Sinco / Los Angeles Times)

Taylor Swift performs at KIIS-FM’s Jingle Ball concert at Staples Center in Los Angeles. (Luis Sinco / Los Angeles Times)