Today is Attacking Young Boys&rsquos birthday&hellipand he could be officially 17 years of age! Justin did most of his birthday celebrating this past weekend, as well as, he spent most of his time regarding his girlfriend, Selena Gomez. Though they haven&rsquot formally confirmed actually dating, Selena Gomez and Justin Bieber have been seen together around Hollywood, plus they were even spotted smooching at the Oscars. Selena Gomez and Usher spent the weekend on the St.