Singer cancelled 22 dates as she undergoes hip surgery
Pop singer requires hip surgery for tour injuries and will no longer be able to perform
Singer has been forced to take a break due to joint pain
Producer Zedd says he and singer are working on something 'unique'
The details emerged during the 'Born This Way' singer's current court case
Jennifer O'Neil claims Gaga forced her to share a bed with her
Singer also describes ex-assistant Jennifer O'Neil as a 'fucking hood rat'
Survey claims the singer has 'bored the internet'
Popstar's VEVO account reduced significantly following clear out
Producer Zedd has spoken about progress on the singer's album