Boo is a Pomeranian. He has been declared to be the world's cutest dog and has his own Web site as well as his own Facebook page with almost 5 million fans, as of August 2014. He is rumored to be owned by an employee of Facebook.
Boo was born on March 16, 2006. His owner has been posting pictures of him dressed in various outfits on Facebook since 2009. He has appeared in several commercials, and a book featuring pictures of him has been published and is for sale on Amazon. A line of stuffed toys that look like him is also for sale.