In case you had ANY doubt left in your mind (or if you were secretly hoping he wouldn't be serious about her, subsequently break it off with her, & start dating you instead): The Biebs is in love. So much so in fact, that he wrote & produced his very first song for girlfriend Selena Gomez.
The story goes that Biebs was on the same flight as will.i.am and actually woke him up from a nap to show him the new track. According to will: "it's dope."
Check out the video below for more details. [PopCrush]