Halle Berry, Jimmy Fallon Halle Berry, Jimmy Fallon

This week, The Tonight Show bestowed upon us a Crosby, Stills, Nash & Young cover of Iggy Azalea's "Fancy," as well as Jimmy Fallon and Halle Berry's human hamster roll. Also, Jim Gaffigan guest-starred in the new web series "Teachers Lounge," and Mystery Girls stars Jennie Garth and Tori Spelling took a pop quiz about their days on Beverly Hills, 90210. And the Internet memorialized Brett Bunsen, who has been shot a total of nine times on Archer. Check out those clips and more in our weekly roundup of the best online videos:

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 Jimmy and Halle's human hamster roll: Visiting The Tonight Show to promote her new CBS show Extant, Halle Berry proved she's up for anything by participating in a "human hamster roll" with Jimmy Fallon. Can this be an Olympic sport?

CSNY's "Fancy": David Crosby, Stephen Stills and Graham Nash also stopped by The Tonight Show this week, and were joined by a, ahem, special guest (wink, wink) — their CSNY bandmate Neil Young. Together, they all performed a folk version of Iggy Azalea's "Fancy."

YouTube introduces 48- and 60-FPS videos: Over the next few months, YouTube will begin to showcase more videos in 48 or 60 frames per second (a.k.a. a higher quality), which is particularly good news for gamers. Check out one of the early examples — the trailer for the upcoming videogame "Battlefield: Hardline." (via Tubefilter)

Teachers LoungeAfter a successful Kickstarter campaign, the fledgling website SnagFilms' Thundershorts unveiled its new comedy series Teachers Lounge this week. Comedian Jim Gaffigan stars in the first episode as a school nutritionist who runs an oddly-named wine company in addition to his day job. (via Tubefilter)

Jennie Garth and Tori Spelling revisit Beverly HillsFormer Beverly Hills, 90210 co-stars recently stopped by the TVGuide.com offices to chat about their new show, Mystery Girls. We couldn't let them leave without taking a little trip down memory lane, so we gave them a little pop quiz. Their task? Put Kelly and Donna's boyfriends in chronological order. Watch the results below — and witness the embarrassing moment when Garth reveals that she had no idea Kelly ended up with Dylan, not Brandon.

Brett getting shot on Archer: R.I.P. Brett Bunsen, the ISIS employee who always seems to find himself in the wrong place at the wrong time on FX's Archer. Brett was finally felled by a bullet to the head in the Season 5 premiere, but only after getting shot a whopping eight previous times. This supercut looks back at his finest most painful moments.

Game of Thrones meets Sin CityIs Westeros the new Sin City? It just might be, if this mashup trailer is any indication.