A very rare occurrence when a song comes on and everyone sings with it because it is so familiar.
1. Today on the bus, "Hey There Delilah" came on the radio, and everyone started singing it. It was such a High School Musical Moment.

2. Yesterday, in art class, the art teacher turned the radio on. Everyone was silent until "Rock and Roll All Night" came on, then they started singing along; it was a total High School Musical Moment.
by Prinsen Kaos September 7, 2010
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To sing random lines in a bunch of different songs out of no where.

Usually very different music styles.
Matt: You spin my head right round...
Katie: Meatspin song! :D
Matt: Don't trust a hoe...
Katie: I did. <.<
Matt: lol
Katie: </3
Taco: *rapes*
Katie: lol thank you. (:

Katie: ALL BETTAH.
Matt: I hate everything about you, why do I love you...
Taco: Because you're stupid.
Katie: Matt is having a bi-polar music moment..
Matt: <.<
by KatieIsPrettyCool August 8, 2009
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When a song is the perfect match for the moment and you feel like in your own movie. It becomes part of the soundtrack of your life.
This song always reminds me of that one night at the beach during my road trip through Australia, what a Music Moment.
by Groovecat November 23, 2018
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