It's the best Christmas present we could ask for on Saturday Night Live: Jimmy Fallon is returning to host, and his longtime friend (and costar in several viral videos) Justin Timberlake will appear as the musical guest.
The bottom line: It's going to be a good episode.
See also: Fallon, Timberlake Try to Stop Making Hashtags Happen

Only Fallon appears in the promos for this weekend's episode, but even JT-less, they include some musical flavor as Fallon duets with two SNL cast members. He and Kenan Thompson hilariously attempt JT's "Mirrors," followed by a catchy duet with Kate McKinnon. Fallon also gets giddy remembering his old stomping grounds, where he anchored "Weekend Update" alongside Tina Fey.
Fallon and Timberlake appeared together in SNL skits in 2003 when Fallon was a cast member and Timberlake hosted:

Timberlake has hosted SNL five times, and he's probably most remembered for his epic "D*ck in a Box" sketch. Of course, he's only set to perform on Saturday's episode, but if the show's writers know what's good for them, they'll make sure JT gets some screen time with his pal.
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BONUS: 'SNL' Holds Auditions for Black Female Cast Member
Erica Ash has worked on The Big Gay Sketch Show and joined the MADtv cast in its final year. The comedian has also done voice work for video games and played a supporting role in Scary Movie 5. Be sure to check out this clip of her talking about getting the part on MADtv.
Follow her on Twitter.
Kerry Coddett is a stand-up comedian and choreographer from Brooklyn. She currently writes and produces skits on her YouTube channel, The Coddett Project. While comedy is her passion, she has also worked in fashion and dance, which she's integrated into her sketches.
Follow her on Twitter and YouTube.
Bresha Webb currently stars on TVone's Love That Girl. Webb has had plenty of acting experience, appearing on E.R. and MTV's American Mall. Not to mention, her impressions are hysterical, including her take on Tameka "Tiny" Harris.
Follow her on Facebook, Twitter and Instagram.
Winner of the NBC Universal Diversity Scholarship, Natasha Rothwell's experience is in stand-up comedy. She studied at the Upright Citizen's Brigade Theater in New York and has performed in multiple improv festivals. She is a current cast member of UCBT Maude team Dinner, and is part of the award-winning comedy duo Hodapp and Rothwell. Check out this routine in which she takes on the role of a distressed flight attendant.
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Haddish, like many others who auditioned for the open spot, has a strong background in acting. She has appeared on That's So Raven, My Name is Earl and It's Always Sunny in Philadelphia. She has performed in The Comedy Store on Def Comedy Jam, and in this routine at The Laugh Factory.
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Misty Monroe isn't just a comedian -- she also teaches drama to elementary school kids. This Northern Californian is a member of Groundlings Theater, and has appeared on CBS' How I Met Your Mother and 2 Broke Girls.
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A current cast member on MTV's Girl Code, Tanisha Long has also performed with the Upright Citizens Brigade and the PIT, as well as CollegeHumor and the film Admission. She also posts videos on YouTube, including Advice Animal.
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Amber Ruffin is a writer, producer and actress, best known for her work on the series RobotDown. While Ruffin does not have many acting credits to her name, this clip proves she'd be ready for the SNL stage.
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Sasheer Zamata has a number of publications under her belt, including work for Jezebel, CollegeHumor, BUST and Hairpin. She is set to star in Hey Girl and Would You Fall For That? this fall. Zamata also stars in the web show Pursuit of Sexiness with Girl Code's Nicole Byer, which you can see here.
Follow her on Facebook, Twitter, YouTube and Instagram.
Gabrielle Dennis is no stranger to the small screen. She has had reoccurring roles in The Game and Blue Mountain State. Check out her comedy skills in this clip.
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Leslie Jones is both a stand-up comedian and actress, featured in such films as Wrongfully Accused and National Security. She was also a college athlete and was featured in VIBE magazine. Check out her hilarious stand-up routine at The Laugh Factory.
Follow her on Facebook, Twitter and YouTube.
Image: NBC