what is the episode when all the guys
are sitting around near the lunch counter
talking about what guys they think
are the most handsome and lowell
says "mr tom petty" and antonio likes
a gymnast i think.

which episode is that?

I remember that episode, but I cannot tell you what happens in the rest of it.

It made me laugh though, because, even though I think Tom Petty is godlike in terms of his musical abilities, he is not even remotely attractive physically.

It's from the episode where Brian wanted to get a nose job.

The episode is called "Noses off" from season 4