Justin Bieber was in my dream before I even heard of him?

Justin Bieber was in my dream before I even heard of him?

ok I had this really good dream and this guy (justin bieber) was showing me how to play a song on gutiar and started singing to me. The thing is I had ABSOLUTIALYno idea who this "mystery guy" was until I was on iTunes and saw the album cover. I had his image planted in my head since the dream.
I know I had no chance but I feel like I know him from somewhere.

Did my dream mean anything???or just a dream?