What makes a good Sia impression according to Celine? A little rasp and a whole lot of hair, apparently!
As far as embarrassing celebrity stories go, the latest from Nick Jonas is a pretty good one.
Madge whipped out a classic for 'The Tonight Show Starring Jimmy Fallon' — and then insisted on the late night TV host to push her right off the stage.
The Queen of Pop is set to appear for a special performance, and President Barack Obama will be making his 'Fallon' debut. What's about to go down?
If you thought your double-chin/cross-eyed combo was dizzying...
Ari and Jimmy demonstrate their comedic chemistry once again, lip syncing to a string of old and new favorites.
While playing a voice-altering karaoke game on 'The Tonight Show,' Amy Adams proved she can "Work" like RiRi.
Gwyneth Paltrow and Jimmy Fallon sing real, awkward failed text flirts on 'The Tonight Show.'
Demi expertly took on Cher, Christina Aguilera, and Fetty Wap as Jimmy fought back with his best Louis Armstrong and Dave Matthews.
Jimmy Fallon is back as Sara "with no H because H's are Ew!" and Jennifer Lopez plays Gabby who finds out her dad is on Snapchat. Ew!