By Chris Robertson, news reporter
Reports in the US say that Sir Mick Jagger, the iconic lead singer of the Rolling Stones, is set to undergo surgery this week, to replace a damaged valve in his heart.
At the weekend, they postponed the US leg of their current tour, so that Sir Mick could undergo medical treatment, after he was told by doctors he could not perform.
According to the New York Post's "Page Six" site, Jagger has a damaged valve in his heart, and is set to receive a stent, sparking worries about the veteran musician's health.
The 75-year-old once appeared to epitomise sex, drugs and rock and roll, but his hedonistic lifestyle is now firmly in the past.
He gave up drugs when he met his second wife, Jerry Hall, and rarely drinks alcohol.
He is also known to eat and drink healthily and exercise regularly, with some claiming he runs up to eight miles a day, in an effort to maintain his famous 28-inch-waist.
He was even spotted on a Miami beach on Sunday, allaying worries that the singer is seriously ill.
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The singer will undergo surgery in a New York hospital this week, according to the reports.
Jagger will reportedly receive a stent, which is a small metal tube that is inserted into the body to open up arteries.
Procedures usually involve inserting the tube into an artery using a small inflated balloon-like device, before it is removed, leaving the stent in place.
Patients often see a quick recovery when getting a stent and can be out of the hospital just 24 hours after the surgery.