JaVale McGee's music career has reached Justin Bieber status ... 'cause the L.A. Lakers star helped write and produce a song on the Biebs' new album!!
Yes, you read that correctly -- the 7-foot tall NBA center is a big-time music producer in his free time ... and officially got credit for his role in making Bieber's song, "Available" on his new project, "Changes."
Of course, McGee has dabbled in music for years ... and has worked with old Lakers teammates like Lonzo Ball in the studio in the past.