Footage has emerged from the US of a boyfriend surprising his Belieber girlfriend with Justin Bieber tickets.

The video, filmed in California on March 21, shows the boyfriend surprising 22-year-old Kelsi with the concert tickets, and her reaction is priceless.

The filmer later wrote online: "Kelsi went to the concert with me about an hour after the video was filmed.

"She sang every word to every song that Justin performed."