Paul McCartney is so sick doctors forced him to cancel his entire tour of Japan.

The former Beatle caught a virus last week, and doctors ordered "complete rest" for the 71-year-old, according to a statement on McCartney's official website. That led to the cancellation of several shows, including Wednesday's return to Nippon Budokan hall, where the Beatles performed during their first Japan tour in 1966.

The Beatles ... that was a pretty decent band.

McCartney is still scheduled to play Seoul on May 28 at Jamsil Sports Complex Main Stadium, followed by 19 U.S. performances. And he'd better be up to it, or he faces losing his entire U.S. fan base.

"I'd like to thank my Japanese fans for their love, messages of support and understanding," McCartney said in a statement. "I hope to see you all again soon."

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