Justin Bieber shows off his basketball skills to girlfriend Selena Gomez

They may be teenagers, but Justin Bieber and Selena Gomez's romance is quickly getting serious.The 17-year-old teen heartthrob took his Disney star girlfriend, 18, back to his hometown in Canada to meet his loved ones.And it didn't take long before Justin was showing off in front of his pretty other half, as he engaged some friends in a game of street basketball.Bieber put his sporting prowess to