Justin Bieber OR Justin Beiber ? value of a misspell.

I saw a domain name auction today which was quite interesting. The sale is for the domain name JustinBeiber.com . As per the seller, this domain name was bought in 2008 and no development is done for the site and is parked free with google adsense. But still it has achieved a google page rank of 3 and with a monthly income of $1,000. What is the magic ?