Rod Stewart has canceled the six-night Caesars Palace residency that was supposed to kick off Tuesday, after undergoing an emergency coronary stent procedure. The 81-year-old singer's "One Last Time" shows at the Colosseum, originally set for Aug. 18-29, are off, along with his remaining farewell-tour dates through September, according to Variety.

"I'm already feeling better and very much on the mend," Stewart said in a statement announcing the cancellations.

No timeline has been given for when the residency or tour might be rescheduled. Stewart, who has performed for more than five decades, has been billing the run of shows as one of his final major tour cycles.