According to People, Justin Bieber's exclusive brand of nail polish has sold out at more than three-thousand Wal-Mart stores nationwide.  The One Less Lonely Girl collection for Nicole by OPI launched in December, along with similar lines associated with Katy Perry and Serena Williams.  The Bieber polishes are still available online and Walmart is working on replenishing their stock.  The collection will be carried by other retailers by February and will expand to 14 colors.