Justin Bieber -- No Concentration ... All Camp

Dear Diary,

This house has officially jumped the shark. Justin Bieber showed up a few days ago and let me tell you ... I actually was a Belieber, until he started boxing with a bud in the basement.

He was a little too cool for school with his shades, along with a hat AND a hoodie -- which seems like overkill.

Frankly ... I can't get past that guestbook entry, where he wrote, "Anne was a great girl. Hopefully she would have been a belieber."