Rapper Big Boi is recovering after undergoing knee surgery on Wednesday (29May13).

The Outkast star, real name Antwan Andre Patton, injured himself during a performance at the Summer Camp Music Festival in Illinois on Sunday (26May13) and subsequently called off the rest of his tour shows this week (begs27May13).

The musician has been sharing pictures of his damaged left knee on his tumblr.com page, and on Wednesday he revealed to fans he had undergone an operation at a medical centre in Atlanta, Georgia and was facing six weeks of recovery.

Alongside a photograph of himself in a wheelchair, he added, "God Bless Atlanta Sports medicine for a successful Knee Surgery fixed my torn Patella. Man this bout to be a long 6 weeks."

Big Boi's upcoming tour dates have reportedly been pushed back to September (13).