Britney Spears has surprised fans with a new cover to her 2016 album Glory after it shot to No 1 on iTunes this week.

The 38 year-old singer celebrated the news with a new cover photographed by Dave LaChappelle.

She wrote on Instagram: “You asked for a new Glory cover and since it went to number one we had to make it happen !!!! Couldn't have done it without you all.”

Earlier she had posted: “Hi guys, so I'll tell you I just figured out that Glory went to number one on the iTunes charts. I have no idea what happened.

“Because of you I'm having the best day ever.”