“Saturday Night Love” closes out the year with host Jimmy Fallon and musical guest Justin Timberlake. In the promos for tonight’s Christmas episode, the dynamic duo perform their comedy shtick and do a little song and dance.

“This Saturday night, we’re breaking all the rules,” declares JT, while Jimmy responds, “We’re not.”

This marks JT’s fourth time as musical guest. He previously served as host and musical guest in March when his album The 20/20 Experience was released.

Check out the promos below.