Photos: KIIS-FM’s Jingle Ball

Ed Sheeran performs at the 102.7 KIIS FM’s Jingle Ball on Dec. 1 at the Forum.

Sam Smith performs at 102.7 KIIS FM’s Jingle Ball.

Demi Lavato and guest Cheat Codes perform at 102.7 KIIS FM’s Jingle Ball.

Demi Lavato performs at 102.7 KIIS FM’s Jingle Ball.

Alex Pall of the Chainsmokers performs at 102.7 KIIS FM’s Jingle Ball.

Andrew Taggert of the Chainsmokers performs at 102.7 KIIS FM’s Jingle Ball.

Taylor Swift performs at 102.7 KIIS FM’s Jingle Ball.

Taylor Swift performs at 102.7 KIIS FM’s Jingle Ball.

Taylor Swift performs at 102.7 KIIS FM’s Jingle Ball.

Halsey performs at 102.7 KIIS FM’s Jingle Ball.

Halsey and guest Lauren Jauregui perform at 102.7 KIIS FM’s Jingle Ball.

Halsey and guest Lauren Jauregui perform at 102.7 KIIS FM’s Jingle Ball.

Niall Horan performs at the 102.7 KIIS FM Jingle Ball.

Niall Horan performs at 102.7 KIIS FM’s Jingle Ball.

Charlie Puth performs onstage at 102.7 KIIS FM’s Jingle Ball.

Charlie Puth performs at 102.7 KIIS FM’s Jingle Ball.

Charlie Puth performs at 102.7 KIIS FM’s Jingle Ball.

Liam Payne performs at 102.7 KIIS FM’s Jingle Ball.