jimmy fallon

Just when we thought we couldn't be any more obsessed with Meghan Trainor's 'All About That Bass,' Jimmy Fallon had to come along and make it positively epic.

Jimmy Fallon has finally gone too far. 'The Tonight Show' host famously likes to have fun with his celebrity guests, engaging them in modified parlor and drinking games, but he's seriously gone off the deep end this time around. Fallon hosted America's sweetheart Julia Roberts on last night's show, during which he had the beloved actress join him for a brand-new game: Face Balls.

The '50 Shades of Grey' trailer is alternately steamy and scary, but late-night host Jimmy Fallon wasn't content to show it to his house band, the one and only Roots, as is. Nope, that thing needed to be modified just a touch, to really make sure that the band was paying the proper attention to their trailer-watching assignment. So the 'Tonight Show' host did what anyone would do -- he inserted a scary scream face into the middle of the trailer. Obvious, right?

Remember when NBC News anchor Brian Williams "rapped" Snoop Dogg's 'Gin and Juice' and Sugarhill Gang's 'Rapper's Delight'? Well, the respected anchor is spittin' those rhymes yet again, thanks to Jimmy Fallon and 'The Tonight Show' crew who carefully edited clips of Williams to make it appear like he's rapping Sir Mix-A-Lot's 'Baby Got Back.'

Just a few weeks after they shimmied together in the magic that was 'Tight Pants,' Jennifer Lopez is once again dancing with Jimmy Fallon -- and let's face it: she kind of owed him after that whole dance diss debacle.

Well, this one pretty much sells itself. Jimmy Fallon unveiled a Father's Day-targeted take on his ever-popular "Evolution of Dance" on last night's 'Tonight Show,' and this one just hit it right out of the park.

Imagine a mythical land -- a small town, really -- where there's only room for just one inhabitant to sport some tight, tight pants. How would people challenge each other for tight-pants supremacy? Last night on 'The Tonight Show,' just such a showdown hit the screen, when host Jimmy Fallon deluded himself into thinking his tight pants could somehow prove to be better, badder and tighter than Jennifer Lopez's tight pants.

Channing Tatum ('22 Jump Street') is challenged to an arm wrestling match by Jimmy Fallon on 'The Tonight Show.'

When you think of the duo Macklemore and Ryan Lewis I'm pretty sure the image you get is just Macklemore and not Ryan Lewis.

Despite the hurtful remarks that paparazzi were making to him, Jonah Hill knew he was wrong when he lashed out at a photographer recently, calling him a "f----t." While he apologized for his actions on the 'Howard Stern Show' yesterday morning, he later went on 'The Tonight Show With Jimmy Fallon' to further express his regret in an emotional and heartfelt apology.

Current action star and former football star Terry Crews hit the program last night, and we suspect he had no problem with Fallon's request to perform a nip sync together. No, really, a nip sync.

Jimmy Fallon ended his Tonight Show monologue on Thursday (5/8) with a joke about Wichita Falls and our plans to treat waste water and use it for drinking water.