Carnival Costume Couple (s)?

My friend and I are going to a carnival ball and looking for a costume
Best something simple, fast for what you need only tshirts (with the appropriate imprint)
(We imagine something like "Netflix & chill" or "Salt & Pepper" (I hope you understand what I mean)
Maybe something that has something to do with music?

Like to leave all the suggestions that come to mind

Ernie and Bert,
M & M (one color each)
I would not think of music now