Stupid Cupid
S7:E25
2010
IMDb
Timmy seeks help from Cupid to win the love of Trixie Tang, but Cupid is on vacation. So Timmy has Cosmo fill in for the love god, but Cosmo only causes himself, Wanda, Mr. and Mrs. Turner, and Mr. Crocker to fall head over heals in love with all sorts of things.