Justin Bieber has remixed Lil Wayne's popular 'How To Love' track in honor of the rapper's birthday.

Biebs switches up the pace of the hit single slightly and tries his hand at rapping, which will no doubt shock his fans. The youngster keeps the lyrics the same but adds his own bars to his rap verse.

Weezy celebrated his 29th birthday yesterday, and Justin decided to send him the track as a present. "Happy birthday @liltunechi," Biebs wrote before sending him the track.

'How To Love' is taken from Lil Wayne's latest studio album Tha Carter IV and is currently sitting at number five on the US Billboard charts.

Justin Bieber was recently seen in Tennessee, filming a video for his Christmas album and we all know that where Bieber goes, Selena follows.

Fans who saw them took to twitter to claim their sightings;

@Sarah_Wyland said, “Apparently Selena Gomez AND Justin Bieber are in Franklin shooting a video right now. You’ll find 3/4 of the teenage girl population there.

Added @JDBGottSwagg, “I said this to Selena: “Thanks for making Justin happy” She smiled and gave me a hug. And Justin? Just watched us. I hugged him :’).”