Seth McFarlane recently appeared on the Tonight Show Starring Jimmy Fallon to promote Ted 2, and Jimmy wisely challenged him with the 'Wheel of Musical Impressions.'
Jimmy Fallon has created a monster with his Lip Sync Battles, and Lena Dunham's appearance on Friday was another awesome example of how great it can be.
Ed Sheeran made an appearance on the Tonight Show with Jimmy Fallon earlier this week, and put his own laid back spin on songs with a strikingly different sound.
Kristen Wiig stopped by 'The Tonight Show Starring Jimmy Fallon' and did an entire interview in the character of Daenerys Targaryen from 'Game of Thrones'!
Ariana Grande has one set of pipes, but the "One Last Time singer shows just how well she uses them when she impersonated Celine Dion on The Tonight Show Starring Jimmy Fallon last night (March 20).