Watch Jimmy Fallon & Justin Timberlake's "Saturday Night Live" Promos

Got plans tonight? Cancel them! Or at least be home in time for “Saturday Night Live,” because it’s the Christmas episode and Jimmy Fallon is hosting, with musical guest Justin Timberlake. Jimmy will no doubt have a new Christmas jingle to debut, and JT will surely be bringin’ it on down to Something-ville, so I