The girl who sits next to me just said "Brrrr it's cold in here" and instantly I sing in my head "there must be some Toros in the atmosphere" ala Bring it On.
Another favorite is "Stop" and I usually go with "Hammer Time" as opposed to "Collaborate and Listen".
Movie quotes happen a lot too thanks to my H. "You're goofy"/"Don't piss me off Art" happens a lot bc he often calls me goofy.
Any other common speech phrases you can help but equate to song lyrics (or cheers) or movie quotes? I know I do it a lot and laugh to myself every time.