Here’s more information about who was all behind the writing & production of Justin Bieber’s upcoming new single “Boyfriend.” Mike Posner and Mat “Blackbear” Musto co-wrote the song with Justin, and Mike and 21 year-old multi-platinum music producer Mason “MdL” Levy co-produced. Producer Mason “MdL” Levy has worked with Justin and Mike before on: Justin…

“My big announcement is that on March 26, my first single is coming out and it’s called “Boyfriend,”” the singer shares on The Ellen DeGeneres Show in an episode airing Thursday (March 1) – the same day he turns 18. “Basically I’m talking to this girl if I was your boyfriend I would never let…

We hear that a new @justinbieber song drops in 2 weeks and it was produced by @MikePosner . We hope this is true! — HOT 1079 (@HOT1079) February 29, 2012 Rumor is @mikeposner produced the new @justinbieber single. If its true it excites me greatly.Big fan of both. Guys always did me right. — Phil…

in the studio with @timbaland and the crew. #creating — Justin Bieber (@justinbieber) February 1, 2012   also bigups to @MikePosner & @CorteELLIS_ they will be in the building 2nite to0 — Timbaland (@Timbaland) February 1, 2012   @MikePosner @corteellis_ let’s get it — Timbaland (@Timbaland) February 1, 2012   Justin Bieber is recording his…