Rolling Stones frontman Mick Jagger is set to undergo heart valve replacement surgery.
The Rolling Stones announced the cancellation on Sunday saying "Mick has been advised by doctors that he can not go on tour at this time, as he needs medical treatment".
The legendary singer and songwriter, who is 75 years old, announced over the weekend that he would need to postpone the band's upcoming US tour. The band added that Jagger "is expected to make a complete recovery so that he can get back on stage as soon as possible".
"I really hate letting you down like this", he wrote on Twitter, without specifying what treatment he was receiving.
Jagger himself is optimistic tweeting to his 2 million followers that he is devastated, but working hard to get back on stage soon.
"Once again, huge apologies to everyone".
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Jagger, who has eight children, five grandchildren and a great-granddaughter, has maintained his energetic stage performances well into his 70s.
In a tweet on Saturday, the band wrote that it was postponing shows in the USA and Canada due to the 75 yr. old Jagger's health.
It's most often the aortic valve that is replaced in adults, according to the US National Library of Medicine.
A source also told The Sun that: "Mick will be undergoing a non-invasive heart valve procedure".
If it's not treated, people can have periods where they lose consciousness. The procedure "wedges a replacement valve into the aortic valve's place" through a small tube without having to remove the old valve, according to the American Heart Association.
He said traditionally the operation has been done with open heart surgery but "new techniques allow us to do these procedures with minimal invasion with a catheter (tube)".
Heart valve surgery is needed when the heart valve has built up calcium over time.