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Tuesday, Aug. 28, 2007 | 10 p.m.

WHO'S MADE THE LEAP

There are musicians who dabble in acting and actors who dabble in music. Seems like some musicians really are actors.

Lots of rappers, too. But fewer actors really are musicians (although many of them show up in Las Vegas with their bands anyway). Don't believe us? Consider this abridged list:

Actors who dabble

William Shatner and Leonard Nimoy

Singing where no man has gone before.

Lindsay Lohan

Singing proof that P.T. Barnum was right.

David Hasselhoff

Millions of Germans can be wrong.

Bruce Willis

Bruno is a legend in his own mind.

Russell Crowe

Too many grunts and not enough of his big-screen magnetism behind the mic.

Musicians who dabble

Elvis Presley

All 31 movies were an excuse to hear him sing.

Eminem and 50 Cent

Playing their legends in “8 Mile”

and “Get Rich or Die Tryin.'”

Mariah Carey

All that “Glitters” isn't gold.

Britney Spears

Let's hope she doesn't go down to the “Crossroads” again.

Ice Cube

All the promise of “Boyz N the Hood” has gone down the drain.

Actors who are musicians

Kevin Bacon

“Footloose” star needed only one degree of separation to form the Bacon Brothers.

John Belushi and Dan Ackroyd

“SNL” stars knew enough to get together “the band.”

Jennifer Lopez

Former Fly Girl took “Selena” role seriously and carved out recording career.

Woody Allen

Goes “Bananas” over Dixieland.

Jack Black

His comedy and love of rock mix in Tenacious D.

Musicians who are actors

Frank Sinatra

Won an Oscar for “From Here to Eternity”

Liza Minnelli

Won an Oscar for “Cabaret.”

Barbra Streisand

Won an Oscar for “Funny Girl.”

David Bowie

He's played an alien, Andy Warhol, Nikola Tesla and Pontius Pilate.

Harry Connick Jr.

Romantic (“Hope Floats”) and really creepy (“Copycat”).

Rappers who are actors

Tupac Shakur

Watch Tupac with Tim Roth in “Gridlock'd” and you'll regret he didn't have a longer film career.

Will Smith

The Fresh Prince.

Queen Latifah

The Princess of the Posse has become a glamour queen.

Mos Def

One of the most literate rappers can even carry Bruce Willis for “16 Blocks.”

Ice-T

Went from “Cop Killer” to “Law & Order: Special Victims Unit.”