Selena Gomez: 106.1 KISS FM Jingle Ball in Seattle!

Selena Gomez gets a big hug from a young fan backstage at the 2013 106.1 KISS FM Jingle Ball held at Comcast Arena at Everett on Sunday night (December 8) in Seattle, Wash.

The 21-year-old actress/singer was a surprise addition to the lineup, which included Fifth Harmony and Austin Mahone.

PHOTOS: Check out the latest pics of Selena Gomez

This year’s official charity for KIIS FM’s Jingle Ball 2013 is the Ryan Seacrest Foundation — $1.00 of each ticket sold will be donated to the non-profit organization, which is dedicated to inspiring today’s youth through entertainment and education focused initiatives.

15+ pics inside of Selena Gomez…