I don't know if you've been catching "The Late Show with David Letterman" on CBS-TV this week, but it has been marking the 50th anniversary of The Beatles' arrival in the U.S. by having musicians perform Fab Four songs all week.

On Tuesday night was a performance by Sting.

He sang "Drive My Car." Doesn't it seem like Sting can sing just about anything?

He was joined by Ivy Levan, a blues and soul singer who released her debut EP "Introducing the Dame" last summer.

By the way, Sting is heading out on an 18-show tour with Paul Simon starting Saturday in Houston.

Lenny Kravitz was on Wednesday night, singing "Get Back." Who knew he was such a big Beatles fan?

On Monday, Broken Bells, the duo of The Shins' James Mercer and producer Brian Burton, or Danger Mouse, performed the Beatles' "And I Love Her."

As for the rest of Beatles Week on "Letterman," well, tonight the Flaming Lips are scheduled to perform "Lucy in the Sky with Diamonds."

It might not be just stand-ins doing Beatles tunes on "Letterman" this week. The rumor is that Paul McCartney and Ringo Starr might appear on Friday night.

While that's not confirmed, wouldn't that be cool? At this point, Lauryn Hill is scheduled to do a Beatles tribute.

See, it can pay to stay up late for television sometimes.

By the way, a little Beatles history lesson for everyone, courtesy of CBS.

"The Late Show with David Letterman" is located in New York's Ed Sullivan Theater.

That theater was the site of the Fab Four's U.S. debut, is the setting for the week-long commemoration of that historic television event on Feb. 9, 1964. The Beatles' first "Ed Sullivan Show" appearance is hailed by many historians and critics to be one of the most important moments in music and television.

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