From this Saturday until Christmas, stars from US tween/teen internet channel AwesomenessTV will cover their favorite holiday songs in a sponsored countdown that marks the DreamWorks-owned net’s first-ever Christmas event.

The presenting sponsor is Aquafina FlavorSplash, which is also encouraging teens to send posts or pics to the brand’s Facebook page in order to receive a free drink. The PepsiCo brand’s #Makeitmerry campaign aims to celebrate all things, well, awesome.

Celebs participating in the Christmas special include girl group Fifth Harmony, which will cover “Have Yourself A Merry Little Christmas” on December 18, the pop-rock boy band Emblem3 (singing “Winter Wonderland” on December 3.), and actor/producer Chester See whose channel has more than 1.3 million subscribers. See will sing “Rudolph the Red Nosed Reindeer” on December 15.

Other featured talent includes Cimorelli, Taryn Southern, Bea Miller, Skylar Stecker, Cody Simpson, Lia Marie Johnson, R5, Niykee Heaton, and Zay Zay and Jo Jo.