The Tonight Show Starring Jimmy Fallon has done a great many insane and lovely things in its life, and its prior life as Late Night With Jimmy Fallon. But this is the most insane it's ever done. Hands down. You don't get sillier or meme-ier than taking one of the biggest songs in the history of recorded music and performing it as four chickens clucking the entire thing.

Performing as the Jagged Little Chicks on Tuesday night, Alanis Morissette joined Meghan Trainor, Jimmy Fallon and an unidentified fourth party to brawk-brawk-rock "Ironic." Chicken sounds only. Throughout. For two and a half minutes.

Morissette was in the house to promote the 20th anniversary collector's edition of Jagged Little Pill. Back on the record's birthday in June, we took a loving look back at the disc's 33 most poetic, scatching, aching lyrics and had six female acts describe what the album meant to them.

Alanis also rocked "Hand in My Pocket" on Fallon: