'Tis the Season: Stars Light the Christmas Trees

You know it's officially the holiday season when celeb-filled Christmas tree lightings start warming us up for the most festive time of the year!

First up is President Obama, who shared a special moment with his daughters Sasha and Malia at the annual lighting of the National Christmas tree on December 6, 2012 in Washington, D.C.

Jewel stunned in a leather dress at the Grove's 11th Annual Christmas Tree Lighting and concert in Los Angeles on November 18, 2013.

Clad in all white, The Voice judge performed at the Grove's 11th Annual Christmas Tree Lighting and concert.

Jason Mraz and Colbie Caillat were bundled up to sing a duet at the annual lighting of the National Christmas tree in Washington, D.C.

Gavin DeGraw and ET's Nancy O'Dell were dressed to impress at the Grove's Christmas tree lighting.

The Backstreet Boys also got into the holiday spirit performing at the Grove.