concern over the biggest names in music mystery, sir Paul Mccartney. He's in a Tokyo hospital, forcing him to cancel concerts. And Dan Harris with the latest. Reporter: This morning, sir Paul... See More
concern over the biggest names in music mystery, sir Paul Mccartney. He's in a Tokyo hospital, forcing him to cancel concerts. And Dan Harris with the latest. Reporter: This morning, sir Paul Mccartney is recovering after a mystery bug landed him in a hospital in Tokyo. The rock legend appeared to be fine last Thursday when he arrived for the Japanese leg of his out there tour. But the next day, he was forced to cancel his first show. Tweeting, I came down with a virus. And following a visit from doctors, I've been told not to perform. I am very sorry to all my fans, as I was greatly looking forward to the concert. Mccartney wanted to perform against doctor's orders but wasn't allowed to. And when his condition did not improve, the rest of his Japan dates and one in South Korea, his first show in that country ever, were all canceled. It's important to him not to let the fans down. And it would have to take something serious for him to cancel the show. He wants to be there for the people who want to see him. Reporter: Mccartney, one of two surviving members of the beatles, has showed no signs of slowing down in his 70s. Whether it's cracking WYES with jimmy Fallon. Or a performance of "Queenie eye" that had the crowd on its feet. The good news this morning, the music is not over. Mccartney is expected to make a full recovery. For "Good morning America," Dan Harris, ABC news, New York.
This transcript has been automatically generated and may not be 100% accurate.