Jennifer Lopez on Jimmy Fallon

Jimmy Fallon and his Tight Pants were upstaged yet again, this time by Jennifer Lopez, who gamely shook it in her own pair of tight, white pants. One guess who won this tight-pants showdown.

An even crazier musical mash-up went down on "Late Night With Seth Meyers," where Lena Dunham donned a platinum wig for her oddball performance to Sia's "Chandelier," which involved knocking over cardboard cutouts and unrolling toilet paper while Sia herself laid face down in a bed.

Meanwhile, over on "Chelsea Lately," "Game of Thrones" star Lena Headey owned up to drinking and tweeting a lot of "bull****." Chelsea Handler admitted her own habit of catching up with "Game of Thrones" episodes -- she's only on season one! -- while on Percocet. "You're going to need more Percocet," advised Headey.

Over on "Late Show With David Letterman," Kelsey Grammer shared a photo of a superfan who had his face tattooed on her arm. Quipped Letterman, "Does a person like this need some direction in life, ya think?"

And in case you thought Tom Cruise was going to just repeat everything he did last week over and over for eternity, a la "Edge of Tomorrow," tonight's "Jimmy Kimmel Live" (on which Cruise guested) was a rerun.

Chelsea Lately

Comic Chelsea Handler presents an irreverent look at breaking news stories, along with gossip and her take on pop culture. Celebrity interviews, viewer call-ins and a rou... Read More

The Tonight Show Starring Jimmy Fallon

The long-running late-night talk show returns to its New York roots for the first time since 1972 when comic Jimmy Fallon takes over hosting duties, accompanied by his Gr... Read More

Late Night With Seth Meyers
Based on 20 critics

The former "Saturday Night Live" cast member and head writer follows on the heels of fellow SNL alumnus Jimmy Fallon to become the fourth host of the late-night NBC serie... Read More

Late Show With David Letterman

David Letterman uses mature humor to appeal to his audience in this weeknight series, which gets its music from a house band led by Paul Shaffer. Among the show's most-fa... Read More