Age really is just a number when your bank account boasts 10 figures. Just ask David Geffen and his billionaire friends, who barely have to buy the company of world-renowned supermodels and a Beatle.

Over the weekend, the 75-year-old studio exec (who is worth around $8.5 bil), partied alongside Karlie Kloss, her beau Joshua Kushner, adorable oil heir Mike Hess, It Girl designer Misha Nonoo, and Paul McCartney aboard his $200 million yacht, Rising Sun. The well-to-do group also included fellow business bros, Henry Kravis and Barry Diller (sans his wife, Diane von Furstenberg).

The luxe excursion across the waters of Italy featured pit stops in Capri, Portofino, and The Amalfi Coast, where the moneyed posse enjoyed lunch at the famed Hotel Lo Scoglio da Tommaso. (Definitely beats out whatever bottomless brunch you got wasted at on Sunday.)

How many times do you think Geffen uttered the phrase "Ah, you kids keep me young!"?

Click through for an inside look!

[Photo via @davidgeffen]