Vote for Your Favorite! The YouTube Music Challenge

"Extra's" Maria Menounos met up with some of YouTube's biggest music stars, including singer/musician Alyssa Bernal, music producer Kurt Hugo Schneider and singer Sam Tsui. Check out their full performances, then vote for your favorite!

Watch Alyssa Bernal and AJ Rafael perform "Falling for Love"!

Check out Kurt Hugo Schneider, Sam Tsui and Jason Pitts' full performance of "Me Without You"!

The voting is now closed. Thanks to everyone who submitted their votes for Kurt and Sam and Alyssa. Kurt and Sam won the vote, 55% to 44%.

Watch as Alyssa, Kurt and Sam reveal how YouTube has changed their lives, which celebrities they're crushing on, and more!

Subscribe to Alyssa's YouTube Channel!
Subscribe to Kurt's YouTube Channel!
Subscribe to Sam's YouTube Channel!
Subscribe to AJ's YouTube Channel!
Subscribe to Jason Pitts' YouTube Channel!