Justin Bieber about to get even HOTTER!!

Is it even possible? YES!

Life & Style reports that Justin is looking to add some muscle to his frame with celeb trainer Danny Musico.

An insider dished to the mag, “He’s at the prime age to take advantage of what his young physique is capable of.”

Another source added, “He wants to make the transition from teenybopper to full on heartthrob. Just like Nick Lachey and Justin Timberlake did.”