The identity of the guy in the marshmallow helmet started out as a mystery, but as the spotlight intensified, it was revealed that a DJ named Chris Comstock is the man behind the music. Check out his biggest hits since his debut in 2015, plus his remixes, collabs, and influences right here on Marshmello: DNA.

So maybe you already know Grace VanderWaal – the kid phenom who got big on YouTube with her covers of Taylor Swift, Elle King and Meghan Trainor.

When she was 12, Grace won the eleventh season of America's Got Talent by singing her own original songs. Since then, she’s released an EP and a full length album, called Just The Beginning. But it can be hard to gain cred when you’re just 14 years old.

Backstage, before a recent appearance on The Late Late Show, Grace put a new spin on a song that she apparently hears about a lot, because people say her last name reminds them of Wonderwall.

By the way, Oasis recorded the original Wonderwall in 1995. Nine whole years before Grace was even born.