Rod Stewart's recent San Diego concert cancellation has sparked discussion after the singer appeared to make a remarkably swift recovery from laryngitis.

The concert, part of his "One Last Time" farewell tour, was called off just 45 minutes before its scheduled 7:30 p.m.

start on Friday night at the North Island Credit Union Amphitheatre.

According to Live Nation, the concert promoter, the cancellation was due to a sinus infection.

Later that evening, a post on Stewart's social media confirmed that doctors had diagnosed him with an acute upper respiratory infection resulting in laryngitis, making him unable to perform.

This rapid turnaround has led to questions from fans and observers.

Stewart himself posted an apology for the cancellation on Friday, expressing a desire to reschedule the San Diego show.

However, a new video clip posted on his Instagram account Saturday morning showed the 81-year-old vocal legend speaking enthusiastically and briefly singing, with no apparent signs of laryngitis.

This ailment typically requires at least a week for recovery and can last up to three weeks.

In the video, Stewart, accompanied by his sons Aidan and Alastair on a private jet, announced they were flying to Boston to watch Scotland in the World Cup.

The clip concluded with them singing "No Scotland, no party!" to the tune of "Seven Nation Army.

Speaking on background, a representative for Rod Stewart informed the San Diego Union-Tribune that they had consulted with the singer's physician on Friday night, confirming the accuracy of the cancellation reason.

The representative further explained that Stewart had been given "a few rounds of steroids and treatment" in hopes he could perform.

He was reportedly at the venue but had no voice, and the steroids evidently took effect too late for the show.

Stewart's Saturday Instagram post did not mention his previous inability to speak due to laryngitis, leading to some fan criticism.

While many comments expressed support, others questioned the timing of his post and the rapid recovery.

One Instagram user, @rhinorunsandwines, commented, "Too ill to perform but okay to fly across the country for soccer?" Another, @grampbearkimlee, questioned, "Why does he post this after disappointing 10-15K fans?"

Rod Stewart's next scheduled concert is set for June 15 at the Red Rocks Park and Amphitheatre in Colorado.

His "One Last Time" tour is slated to conclude on August 15 in Kansas City, with a potential San Diego make-up date yet to be announced.