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You probably can recite 2 birthday songs from memory, but only 2.
(sh.itjust.works)
A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. The best ones are thoughts that many people can relate to and they find something funny or interesting in regular stuff.
There’s also the “It’s your birthday, it’s your birthday!” chant that people do. Not The Birthday Song, but a birthday song.
Edit: after researching it, I guess it’s 50 Cent, I’d always heard it, but never knew the source:
https://youtu.be/cA4SFSUJXyI