Paul McCartney and Ringo Starr came together to promote "The Beatles: Rock Band" video game.

The two surviving Beatles, along with Yoko Ono and Olivia Harrison, appeared yesterday at Microsoft's Electronic Entertainment Expo presentation at the University of Southern California's Galen Center.

"Whoever thought we'd end up as androids?" joked McCartney.

In the music game developed by Harmonix and published by MTV Games, players will be able to follow — and perform as — members of the legendary music group, beginning with their early days in 1963 Liverpool through their final rooftop performance. Unlike its "Rock Band" predecessor, "The Beatles" edition will feature three-part vocal harmonies.

Forty-five Beatles songs will be available on the game's disc when "The Beatles: Rock Band" is released on Sept. 9, including "I Am The Walrus," "Back In The U.S.S.R.," "Here Comes The Sun," "Get Back," and "I Feel Fine."

O'BRIEN TAKES OVER 'TONIGHT SHOW' REINS

A nervous Conan O'Brien debuted as host of "The Tonight Show" yesterday.

He joins a line of predecessors Steve Allen, Jack Paar, Johnny Carson and Jay Leno on television's most historic late-night franchise.

In his opening monologue, O'Brien said he remembered watching Carson as a youngster and saying that's what he wanted to do when he grew up. Now, the red-haired O'Brien says he imagines somewhere in America a kid is watching him and wondering, "What is wrong with that man's hair?"

He said the time of his move was perfect — NBC is a last-place network, California is going bankrupt and "The Tonight Show" is sponsored by General Motors.

Will Ferrell was the first guest. Pearl Jam was the musical act.

'EXHAUSTED' SINGER BOYLE RECOVERING

Susan Boyle, the amateur singer whose turn on a British reality show made her an overnight sensation, remained hospitalized last night for treatment of nervous exhaustion.

Boyle was "exhausted and emotionally drained" following her appearance on the televised finals Saturday night of "Britain's Got Talent," according to TalkbackThames, the company that produces the program. The 48-year-old Scotswoman has decided to "to take a few days out for rest and recovery."

Boyle came in second on the talent show, a shocking result for the viewers and bookies who had expected her to run away with the top prize. Instead, call-in voters gave the honor to Diversity, a dance troupe whose tightly choreographed routine wowed audiences.

Boyle was gracious in defeat, but some commentators said she appeared to be under major strain after weeks of being hounded by paparazzi and reporters from Britain's aggressive tabloids.