obsessive fan
The worst kind of fan. They know all the lyrics, the behind-the-scenes stuff, and the color of the singer's socks. They lose their mind if you don't know who Muse is.
She cried when the singer didn't wear blue socks in the new video.
He threatened to delete my Twitter if I didn't like the cave remix.
I got DM'd a 30-minute rant about a T-shirt that came out last year.