Sir Rod Stewart 'regretfully' canceled two concerts of his Las Vegas residency The Encore Shows at the Colosseum at Caesars Palace scheduled for last Friday and Saturday due to a health issue.

'My apologies to my family of fans,' the 81-year-old British rocker told the Las Vegas Review-Journal last Friday.

'I am on vocal rest as I recover from a sinus infection. I look forward to seeing you at a future show at Caesars Palace or on tour this summer.'

Indeed, the Grammy-winning grandfather-of-five plans on feeling well enough to resume his residency in Nevada this Tuesday.

Ticketmaster issued concertgoers full refunds after 'the event organizer canceled.'

Stewart was last pictured leaving WeHo hotspot Craig's on Wednesday night while all smiles after several high-profile public outings in the UK.

It's been nearly a year since the thyroid/prostate cancer survivor's health put a 'devastating' stop to three of his Colosseum concerts in order to 'recover from the flu.'

In 2024, Stewart declared that he would stop staging 'large-scale world tours' in favor of 'smaller venues and more intimacy' but had no plans on retiring since 'I love what I do, and I do what I love.'

The Swing Fever singer - who boasts 1.7 million Instagram followers - noted: 'I'm fit, have a full head of hair and can run 100 meters in 18 seconds [on my private track].'

Stewart also reportedly keeps fit in his 'massive' gym and indoor pool at his 10-bedroom 18th-century, Grade II-listed manor Durrington House in Essex, England.

'I keep myself very fit. I played soccer all my life – don't so much anymore, because I had a knee replacement. And I've always had a trainer – same guy for 38 years,' the two-time Rock and Roll Hall of Famer told AARP last year.

'We do a lot of underwater training, where the trainer throws a brick into the pool and I have to dive in, push the brick to the end of the pool, and come up.'

Stewart still pulls 15.4 million monthly listeners on Spotify, and he's sold more than 120 million records worldwide since his 1963 debut.

The luxury car collector is best known for his hit songs Baby Jane, Maggie May, Have I Told You Lately, This Old Heart of Mine, Forever Young and Da Ya Think I'm Sexy which he ripped off from Brazilian musician Jorge Ben Jor.