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Not Everyone Can Party In Vegas: Watch Tori Kelly, Kat Graham And More Try To Guess Who Is Legal

It's not as easy as it looks!

I think we can all agree that Las Vegas is the party capital of the world.

There's clubs, gambling, Britney Spears -- basically everything you need for a night you will always remember, or in some cases, want to forget.

But not all of our favorite artists can enjoy Sin City to the fullest, because they are under the legal age of 21. Granted, they can hit the endless buffet hard, but they have to take a backseat when it comes to partying along with Calvin Harris, Tiesto, David Guetta and any other DJ making their mark on the Vegas nightlife.

We recently hit up the iHeart Radio Music Festival in Las Vegas and put celebs like Tori Kelly, George Ezra, Kat Graham, and more to the test to see if they could guess who among their fellow artists are even allowed to party in Vegas. Clearly, this is harder than it sounds! Check out the video and play along.