19.7°C Not observed 
LOS ANGELES, Calif. - A day after being feted as the MusiCares Person of the Year, Paul McCartney received a boisterous standing ovation — for practising.
Yes, the Beatles legend brought a small group of onlookers to their feet while running through his performance for the 54th Grammy Awards — a real rarity at rehearsals, where most in attendance are members of the press or industry veterans.
With an orchestra behind him, McCartney ran through two separate performances Saturday for the annual awards bash. Canadian Diana Krall and the Eagles' Joe Walsh joined Sir Paul for his new jazz tune "My Valentine," while Foo Fighters' Dave Grohl and Walsh added blistering guitar solos to a performance of the "Abbey Road"-closing trifecta "Golden Slumbers," "Carry That Weight" and "The End."
"('My Valentine') is really beautiful. There's a solo in the middle of it and (McCartney) asked if I would help him out with it — and I said, 'Well, yeah,'" said Walsh, clad in a Ramones T-shirt and flashing an exaggerated facial expression that indicated the decision was a no-brainer.
The Beatles medley was an involved number, with a string section and four guitarists eventually swapping solos. It took the better part of the allotted rehearsal time just to assemble all the players onstage and check the levels on the instruments.
Eventually, even McCartney seemed to want to get on with it.
"We're ready to run it," he said eventually. "Well, I am, so that means we are."
But the newly assembled group obviously didn't need much time to nail the performance. They only ran through the full medley once before eliciting the warm reaction from the audience, and with that, the 69-year-old McCartney and his cohorts left, feeling sufficiently prepared for Sunday's Grammys.
