To longtime Beatles fans who immediately burned "Revolver" and "The White Album" onto their home drives when they first got their iPods -- and especially to any who don't even yet own iPods -- Tuesday's big announcement that Apple is now selling Fab Four songs off its site probably didn't seem all that big a deal. But it really is. More than any other music act of the 20th century, the Beatles have crossed generations and continue to drum up new fans. However, most music listeners under the age of 25 don't buy CDs anymore. So until now, these young fans did not have a way of owning any Beatles music. Well, except for the "Beatles: Rock Band" video game.

This could be quite a game-changer for the Beatles catalog itself. Songs are displayed in the iTunes store based on which ones are the top-downloaded tracks, and thus their rankings could be quite different from the norm. Now, instead of obvious hits such as "Hey Jude," "Let It Be," "Yesterday," "Something" and other wussy classics with little appeal to kids, there could be quite a dramatic shift in which Beatles songs are perceived as the quintessential tracks after today's iTunes users get their hands on the legacy.

Here are some predictions for which songs will be among the Beatles' top sellers on the site:

"Come Together." Hip-hop is huge on iTunes, and this song had John Lennon rapping before Jay-Z was born.

"Birthday." It's one of the stupidest songs in the canon, but everybody who plans to let their iPod be the DJ at a birthday party will be looking for it.

"Why Don't We Do It in the Road?" A song that definitely seems more funny when you're 16.

"Michelle." Imagine every Ringtone user who knows somebody named Michelle.

"Yellow Submarine." Parents with iPods and young children are always hungry for kids songs that don't suck.

"Revolution 1" and "Revolution 9." Not to be confused with the classic, rabbel-rousing single "Revolution," these "White Album" throwaways (remember: "Number 9... Number 9") will become bigger sellers exactly because they will be confused for the classic single.

"Hello, Goodbye." Never mind that Sir Paul McCartney sang this one -- so did the cast of "Glee!"

"You Never Give Me Your Money." That's exactly what the Beatles will be saying to their young fans when their music becomes more widely pirated now.