Paul McCartney, '30 Rock' Cameo: Beatle Slaps Alec Baldwin Across the Face (VIDEO) - Spinner

Dave M. Benett, Getty Images

Paul McCartney is used to bringing crowds to their feet during live shows, but last night the rock legend took on another type of live performance. The Beatle was the surprise guest of honor on the second ever live episode of NBC's "30 Rock" last night (April 26).

The 69-year-old was introduced by Kenneth (Jack McBrayer), who escorted Sir Paul to Kabletown executive Jack Donaghy's (Alec Baldwin) private bathroom. McCartney waved to the show's audience before slapping a star-struck Donaghy across the face to bring him back down to earth!

Baldwin later took to his Twitter account to mark the moment as one of the most memorable of his career. "To be slapped on live TV by Sir Paul ... File that in my diary under perfect," he wrote. The singer-songwriter later appeared in a scene where he confessed he'd experienced memory loss after slipping and hitting his head in the bathroom. Cue Liz Lemon (Tina Fey), who tries to convince the rock icon that he's her boyfriend!

McCartney's cameo was a one-time only affair. He joined the cast for the East Coast live broadcast, but was replaced by none other than reality TV star Kim Kardashian for the West Coast audience a few hours later. Baldwin didn't tweet about Kim.

Watch Paul McCartney in "30 Rock: Live from Studio 6H, East Coast"

Watch "Paul McCartney -- Profile"

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