Rod, Aerosmith, Fiddy Rock the Mitzvah

FOR HIRE Hot Rod You know those acquisitive teen strumpets on My Super Sweet Sixteen who arrive at their "invite give-outs" on horseback, choreograph a belly-dance routine, and then are serenaded by Natasha Beddingfield before (OMG!) getting a brand new Escalade? Well, the world's billionaires are watching. And taking notes.

The burgeoning mega-monied class is keeping a host of aging rockstars in business, flying them in on private jets for their birthdays, weddings, and New Years' vodka luge parties.

Indeed, financier Steve Schwarzman, the CEO of the Blackstone Group, <a href="http://www.nytimes.com/2007/01/27/business/27party.html?em&ex=1170046800&en=4121f2287227f718&ei=5087%0A " target="_blank">has booked Rod Stewart (pricetag: $1 million) to perform at his 60th birthday party on February 13 at the Park Avenue Armory, and is inviting 1,500 of his nearest and dearest to celebrate the wrinkly occasion.