Justin Bieber, 'Boyfriend' -- New Song

Justin Bieber is back with his first single titled 'Boyfriend' off his highly anticipated new album 'Believe,' due out later this year. The newly 18-year-old heartthrob teases his young female fans that he's up for being the object of their desire when in reality, his heart really actually belongs to pop star Selena Gomez.

'Boyfriend' was written by singer/writer Mike Posner and the smooth, seductive swagger that made Posner a celebrity with hits such as 'Cooler Than Me' and 'Please Don't Go' can be heard in Bieber's new track. The song is a much more adult tune for the Canadian idol, who tells USA Today: "I'm maturing, and my music's maturing, so I wanted to do something different." No doubt, his adoring fans everywhere are swooning over the lyrics which include, "Chillin' by the fire while eatin' fondue / I don't know about me but I know about you."

'Boyfriend' is already available for download on iTunes. You can also hear Bieber's latest effort on AOL Radio's Fresh 40 station.