Somewhat popular. Like I said, it definitely got some radio play. Especially later at night.
I checked the charts, but the problem is I don't know exactly when it is from, so I don't know when to search. It is also possible it didn't break the top 40.
I know I'm not much help here. I could just ask the girl the name of the song, but I think it might tip her off we might be doing something for her birthday, so I'd rather not have to. No one else knows the name of the song, so I thought I'd check with B8 before I gave up.
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Moops?
"I thought you were making up diseases? That's spontaneous dental hydroplosion."