Keith's Sick 17th Birthday Song is a song sung by Keith Knudsen Jr. and Alexis Beekler in the episode Shame on Pee.
Alexis: Who could it be?
Keith: It's Keith with an invite to his sick 17.
Alexis: It's gunna be sick!
Kieth: It's gunna be tight!
Both: So won't you please tell us that we'll see you tonight!