"Saturday Night Live" will air a Christmas Special episode tonight: find out where to watch a live stream online for free. The Christmas special celebrates 39 years of the best of "Saturday Night Live" Christmas sketches, including D*ck in a Box, Christmastime for the Jews, It's a Wonderful Life Alternate Ending, The Hanukkah Song, Schweddy Balls and more!

Watch the "Saturday Night Live" Christmas Special 2013 live stream online for free here. The encore presentation airs Thursday Dec 19 at 10/9c, featuring holiday-themed sketches from "Saturday Night Live." Watch the Special Online.

One of the sketches will be Justin Timberlake's hilarious skit with Andy Samberg from 2006, "D--- in a Box." The video went viral and later won a Creative Arts Emmy, TODAY reports.

And don't forget to tune in this Saturday, when the last "SNL" episode of 2013 will air with fan-favorite hosts Jimmy Fallon and Justin Timberlake!

Jimmy Fallon was a former "Saturday Night Live" cast member, and will be host of the comedy show for the second time, while Justin Timberlake will be the  musical guest for the fifth time on "SNL" this Saturday, Dec. 21.

Fans can't wait to see the hilarious duo together this weekend!

‏@BTRloverJames13 tweeted: "@jtimberlake @jimmyfallon Can't wait for Saturday Nigh Live next week!!!"

@winternialland wrote: "@jtimberlake @jimmyfallon FAVES I CANT WAIT"

@gudgrl7 posted on her Twitter: "@jtimberlake @jimmyfallon Can. Not. Wait. Going to be epic!!!! #SNL"