On The Tonight Show, Jimmy Fallon and Emma Stone played Whisper Challenge, and let's just say it gave birth to some pretty hilarious moments. If you're not familiar with Whisper Challenge, then here's a quick review of the game's rules.
One person wears headphones so they can't hear what the other person is saying. The person wearing the headphones then tries to guess what the other is saying, but in this version, the person was singing instead of just talking.
Stone wore the headphones first, while Fallon sang the first few lines of Bruce Springsteen's "Born in the U.S.A." Stone struggled to guess correctly, which led Fallon pretending to give birth on his desk. After Stone finally got it right, Stone gave the headphones to Fallon. This time it was Fallon's turn to guess, while Stone sang Britney Spears "...Baby One More Time."
They also played Whisper Challenge with "Blue Christmas" and "Baby Got Back."