Singer also talks about joining The Voice

There’s no room for vanity in late-night.

Miley Cyrus was a guest on NBC’s The Tonight Show Tuesday, and host Jimmy Fallon decided to embrace his silly side with the “We Can’t Stop” singer. “We asked everyone at home to take a video of their kid making their best funny face, so with that in mind, I’d like to challenge you to a contest.

Are you ready for this? It’s time for The Tonight Show Funny Face Off.” Before the game began, he briefly explained the premise. “We’re going to show a clip of one of these kids making a funny face and then one of us is going to try to recreate their funny face live,” he said.

During her appearance, Cyrus predicted that either she or Alicia Keys will take down Adam Levine and Blake Shelton when they join The Voice as coaches next season.

“I think The Voice this year is going to be very fun because we got Alicia and it’s the first year there’s been two girls,” she said. “I think everyone loves to see Blake and Adam go back and forth.”

As for Keys, she explained, “We actually are kind of very much the opposite. We were together today and it’s like a total love fest. Her and I are both extremely mellow.

I think people, when they put girls on TV, they [think], ‘This is how we’re going to get the ratings up because there’s going to be drama and there’s going to be cat fights.’

They’re thinking that we’re just going to bring kind of the dramatics to the show, and we couldn’t be more opposite. We just both love music.”

Cyrus said she and Keys will be at an advantage since they are newcomers. “We haven’t done this for so long, where we really want to work with each artist for as long as we can,” the singer explained.

“Blake made a joke of he knows why I always have my tongue out is because it’s always tired because I never stop talking. But he’s going to regret that when I win because it came in handy when I was there and I really wanted to spend time with each contestant—and there’s some awesome singers.

I didn’t realize how…it wasn’t set up. The kids aren’t secretly in opera houses in Germany. They’re actually random-ass people from around the country.”

(E! and NBC are both members of the NBCUniversal family.)