Okay so you know almost every show has a music moment. This would be the place to discuss your favorites 

I'm not talking about variety shows but sitcoms or dramas that throw in that sometimes unexpected homage to the musical.

Like the Bradys:  Sunshine Day http://youtube.com/watch?v=NaCCG7QkM_c  & Keep On http://youtube.com/watch?v=dUyTZlJnRns

Here are some more of my favs

Facts of Life the Christmas in the Big House http://youtube.com/watch?v=j2exx5mSf_w (sorry the clip is a little jittery)
The Cosby Show Happy Anniversary Cliff and the kids  lip synch
Mary Tyler Moore show- Mary sings two More for the Road in Lou's office

there are more but it just got busy at work so more later

"Step by Step"

A musical guest...

At the end Deb performs with the cast, but never saw it. Only seen the episode  on ABC Family since I wasn't aware of Deb in 1995 and wasn't really into "Step by Step"... the end credits are never shown  :P >:(

http://www.deb.org/ftp/pictures/misc/step2.jpg

If actors breaking into song...


"Sarah Silverman Program"

Either the song she sang on the episode where she invites a homeless maniac into her apartment (about something I probably can't say on this board) or the one she thinks she's a lesbian

Watching the opening credits to the wonder years :)

I can't really think of a favorite from a TV show....but I always love whenever they randomly break out in song and dance in certain movies. For example: the movie, Superstar, starring Molly Shannon. There was a scene where the entire lunchroom broke out in song and dance....it was hilarious. ;D

i like when they break into song and dance numbers on scrubs. i also liked alot of the musical guests on chappelles show

I loved the Once More With Feeling episode of Buffy....

"THEY GOT THE MUSTARD....OOOOUUUUUUTTTTTTT!!!!!!" http://youtube.com/watch?v=d_fcXR6t14k

That episode of 'Taxi' where the gang tells about their fantasies, Elaine transforms the garage into a broadway stage, and the gang puts on a show-stopping number