It's no secret that I'm a Gleek. This is just my kind of show: spontaneous breaking out in song is a must in any show!
I have a lot of favorite moments in Glee, but this was my absolute favorite.
Idina Menzel (the older woman) originated the role of Elpheba in Wicked and Maureen in Rent, two of my favorite musicals. She also played Maureen in the movie version of Rent. She's seriously one of Broadway's leading ladies.
Lia Michele is one of the stars of Glee, and I absolutely love her voice. I have often compared her to Idina Menzel loooooooooong before she became a reoccuring role on the show (and now her MOM! Ahhh!) Her voice is so beautiful and pure. She's a little older than the high schooler she plays (I think she's my age), but I love her.