Jimmy Fallon, Crosby, Stills, Nash, Young, Fancy, CSN, CSNY
Didn't stay up for Monday night's late night talk shows? Moviefone's got you covered. Here's some of what you might have missed:

"The Tonight Show" was back from a one-week hiatus for the Fourth of July holiday, and host Jimmy Fallon pulled out one of his oldest -- and best -- recurring gags in celebration. Dressed up and singing as Canadian rocker Neil Young, Fallon was backed by none other than Young's former bandmates, Crosby, Stills & Nash, who applied their signature tight harmony sound to Iggy Azalea's "Fancy." Fallon/Young does a fine job reinterpreting the tune on his own, but things really take off around the halfway mark when CSN join in. Just try not to crack a smile.

Also on "Tonight," Kiefer Sutherland discussed the enduring success of "24" -- including its newest iteration, "24: Live Another Day" -- as well as the origins of Jack Bauer's favorite catchphrase, "Damn it, Chloe!" It turns out, that while Bauer can kill as many people as he wants, there are still limits to what Fox will allow him to do. "There's no other expletive you can use on network television," Sutherland explained.

Over on "The Late Show," Oscar winner Halle Berry stopped by to promote her starring role as an astronaut in the new CBS drama "Extant." To prepare for the part, Berry said she rode in a zero gravity flight simulator, which consisted of a plane that suddenly dove down from 20,000 feet so its passengers could achieve weightlessness. While the actress said that it was a "delightful" sensation, she admitted that the simulator -- known colloquially as "the vomit comet" -- did indeed make her sick, too. Host David Letterman asked if Berry would attempt zero G again. "No need to," she quickly replied.

Berry also discussed the central mystery surrounding "Extant," which is that her married character returns pregnant from a one-year sojourn to space. The woman has a lot of explaining to do to her confused husband, Berry said, and there are many questions about just what a child conceived in space will be like when it's born. Host David Letterman had some ideas. "It could be an alien," he theorized. "It could be a stowaway."

The actress also shared with Letterman a Top Ten List penned by her 6-year-old daughter in honor of a friend's upcoming nuptials. Berry's daughter offered some marriage advice for the couple, including that they should "Dance and have fun," "Keep nice for your boyfriend," and the number one key to happiness: "You need to kiss."

Back on "The Tonight Show," Nicole Richie also stopped by to promote her new VH1 reality show, "Candidly Nicole," and recounted the time that Britney Spears chained her up like a dog and whipped her during a concert in Las Vegas. Richie explained that she was a huge Britney fan from the time she was 15 -- "I'm like that with Harry Styles now," Fallon quipped -- and while the experience of meeting her idol for the first time was an odd one, it didn't sway her love. "It was the greatest moment of my life," Richie said.