‘MMMBop’ by Hanson
This song is more than two decades old and was sung by a bunch of kids. Songs sung by kids are already a red flag. At some points in the song, they weren’t even singing any real lyrics, like “Mmmbop, ba duba dop, Ba du bop, ba duba dop” which just proves that you don’t need words to sing an annoying song.
All you need is a repetitive, monotonous beat, which this song successfully does. The meaning of the song is misunderstood, but that means they should have done a better job at singing it (via Reddit).