I Have Bieber Fever
Bieber Fever is when girls are so obsessed with Justin Bieber they start acting like he's the next Jesus. You've got it if you have more than one poster, own an album, and know all the words to 'Baby' like it's the Bible.
I had five posters and a full album collection.
I could sing 'Baby' in my sleep.
I missed my math test because I was watching his movie.