Episode 20 of "Grounded for Life"
s02e05 Bang on a Drum

Claudia comes to the rescue of her friend who is desperately in need of a band to play at her wedding and offers up Sean and Eddie's "band" to play at the reception. Sean reminds Claudia of their disastrous performance at a bar mitzvah in high school, but Claudia tells Sean how sexy musicians are and Sean and Eddie agree to do the gig. In need of a drummer to round out the band, they find Dean, a hot guy from a nearby public school. Sean quickly figures out that Lily is smitten with Dean... he's all too familiar with the way Lily is looking at Dean since that's how Claudia looked at him in high school, and he knows what that led to. Meanwhile, Henry is convinced he is adopted when he can't find any baby pictures of himself, but Jimmy assures him he's not adopted—he's actually a robot.