For a couple of grandpa rockers 114 years old (combined), the news shouldn't be that they miss a couple of dates but that they play any at all.

But there it is: Mick Jagger's flu bug will force the Rolling Stones to scotch a Saturday show in London; Ozzy Osbourne's whatever is over, allowing him to return to Ozzfest headlining duties, Friday in the Washington, D.C., area.

Jagger is 60 in people years; Osbourne, 54. In hard-living hard-rocker years, they're, um, let's give the computer some time to tabulate...

Jagger, who became a Rascal-ready sexagenarian July 26, a birthday marked in his home-away-from-the-estate, the concert arena, is hoping to act the age of someone much younger in just a matter of days.

"The doctors tell me that I must have two more days rest--and after that, I will be completely recovered and ready for a full-on stadium show on Sunday," the Stones strutter said in a statement.

Saturday was to be the first of four London shows for the randy band in their old shagging grounds.

"The Stones were looking forward to opening in the U.K.--for their hometown audience--with all guns blazing," world tour promoter Michael Cohl said in a statement.

But on Wednesday, Jagger took ill. Citing a sore throat, a cold and doctor's orders, the frontman backed out of a show scheduled that night in Amsterdam.

At the time, Jagger, who'd missed a Spain date in June due to laryngitis, expressed optimism he'd be "suitably recharged, recovered and fit" for Saturday's show. But then the cold turned into the flu, and more rest was prescribed.

The Stones promise that the Amsterdam gig, like the nixed London one at Twickenham Stadium, will be made up.

The plan is for the band to resume giving fans "Satisfaction" Sunday, the second of two dates at Twickenham. Then the Stones play London's Wembley Stadium and the Astoria, before skipping over to Scotland and Ireland and finally returning to Wembley again in mid-September to run out the Euro leg of the "Forty Licks" tour.

Osbourne's working summer vacation is scheduled to end next Thursday in West Palm Beach, Florida.

The MTV star's road life has been a bumpy one since launching the latest edition of his head-banging Ozzfest in June. The latest hitch came Tuesday when the reality TV patriarch took ill and sat out his set at the PNC Bank Arts Center in Holmdel, New Jersey. "He just wasn't well that day," rep Lisa Vega said Friday.

"No one who has watched him stammer and stumble through the second season of the The Osbournes would begrudge him a night off," Kelefa Sanneh wrote in a review of the Jersey show for the New York Times.

Per the paper, the crowd wasn't notified of Osbourne's absence until 3 p.m., or about five hours into the all-day fest. Korn was appointed acting headliner, and refunds were offered. In the end, Sanneh wrote, "most people stayed."

Vega said Osbourne was "feeling fine" Friday and set to take the main stage later that night at the Nissan Pavilion in Bristol, Virginia.

Jack and Kelly's father figure previously missed shows at his own show in July in Sacramento and Seattle.

On July 24, longtime tour manager Bobby Thompson died in his Michigan hotel during an Ozzfest stop in Detroit. Osbourne described himself as "devastated" by the loss of the friend, who'd been battling throat cancer.

The rocker appeared in better spirits, although demonstrating no better enunciation skills, last Sunday in Chicago, when he and wife Sharon ostensibly sang "Take Me Out to the Ball Game" during the seventh-inning stretch at the Cubs' game at Wrigley Field.

The rendition lacked for lyrics, if not describable sounds, although one wire service duly offered this transcription: "Da da da da duh da da da eam. Duh ee, da da da da dahhh."

Cubs' fans, used to years of broadcaster Harry Caray's mumblings, rewarded the Osbournes with applause. Then the Cubs lost the game.