The cast of 'Glee' will get into the festive, holiday spirit next week for the Christmas-themed episode that airs on Tuesday, Dec. 13 at 8PM EST. Two clips of the cast performing two very different holiday songs have been released, and they'll both have you running for the egg nog and for the Santa-shaped cookie cutter.

The upbeat and fun rendition of Mariah Carey's neo-classic 'All I Want for Christmas' finds the singers dancing in front of a tree while trimming it, playing with decorations and tossing presents to one another. It captures the essence of holiday cheer and of giving and receiving. It's all love and fun, and Carey would be proud of Amber Riley's Mercedes, who leads the song into the holiday promised land.

The cast switches gears with their big and bold cover of 'Do They Know It's Christmas,' which was a charity song (featuring an ensemble cast of performers) that was popular in the 1980s. The cast is seen ladling out food, spending time and spreading cheer among the less fortunate in a soup kitchen. While it's much heavier subject matter, it captures the true spirit of the season of giving in the way that only 'Glee' can.

Watch the 'Glee' Cast Perform 'All I Want for Christmas Is You'

Watch the 'Glee' Cast Perform 'Do They Know It's Christmas?'