Thursday 21st March 2013 by Grace Carroll | Photos by WENN.com

Tags: Lady Gaga

Lady Gaga's ARTPOP album will 'push the envelope', claims the star's manager, who has also revealed she is 'doing great' after recent hip-surgery.

The singer suffered a labral tear to her right hip and had to go into surgery, and was also suffering from inflammation of the joints and synovitis. Of course, in true Lady Gaga fashion she recovered in style, using a custom made black and gold wheelchair.

Fans will still be pleased to know that the star is 'doing great', however, according to her manager Vincent Herbert. He said that Gaga is "doing unbelievable" a month after the surgery, and added that she is "doing wonderful, doing great."

Speaking to the New York Daily News, Herbert went on to say that Gaga is finishing ARTPOP and "ready to get back to work." Talking about ARTPOP, Herbert labelled it "very, very refreshing" and added that the 'Born This Way' star continues to "push the envelope."

Herbert added, "I can’t wait for the world to hear her new music and see her come back healthy, strong and better than ever."

Check out Gaga's custom made wheelchair - not too shabby (Splash)

After her operation, the pop icon wrote an open letter to her fans, thanking them for their continued support.

She told her fans, "Monsters, you really gave me a lot of strength today. Everything happened so fast, but when it came time to face it I reflected on the many stories and experiences you've shared with me about your lives."

Check out photos of Lady Gaga getting meaty when the Born This Way Ball hit Chile