In a new segment called Tonight Show Dubsmash, Selena and Jimmy used the popular phone app to record a video of themselves lip-syncing to some wild and hilarious soundbites.
Dubsmash videos have taken the internet by storm, and turns out, what's even funnier than watching a lip-sync video is watching someone record a Dubsmash video while wearing headphones on The Tonight Show.
The audience couldn't hear what Jimmy and Selena were lip-syncing, so they were just mouthing unintelligibly and in total silence, which was bizarre and hilarious in its own right.
When the audience finally got the see the videos, they learned some very interesting things about the 23-year-old pop singer. a) When she sings the iconic Lion King song, Selena makes some amazing crazy-eyes.
b) She can pull off Liam Neeson's intense Taken speech with some formidable facial intensity.