Miley just got her license and now she's driving her mom's old Porsche Cayenne GTS. Get off the streets!

The former Alias hottie drives a Mercedes S63 co-owned by her and her hubbie Ben Affleck. But don't think that's the only car the family's got.

He's been seen in a variety of exotics, including a Lamborghini Gallardo and a Rolls Royce Drophead Coupe (that even ended up unintentionally getting an employee at the dealership fired, but we like to think he's most comfortable-looking bending his Jeep Wrangler through the streets of Los Angeles, kid in tow.

Sweet Top Gear top celebrity laps! The always obnoxious Simon Cowell drives the always amazing Bugatti Veyron.

Conan O'Brien's a car guy, and given his age, he obviously is the right fit for only one or two performance cars (re: 1980s). His weapon of choice? None other than the Ford Taurus SHO. We're not sure if he still owns it, but if he doesn't, here's a picture of him from a better time.

When he's not hanging out with Anderson Cooper as a hologram on CNN election night coverage, Will.i.am drives a Tesla Roadster. Yes, he's one of the few who's actually been able to get one.

As a daily driver, McGregor switches between a Land Rover Defender and a Toyota Prius. Hmm. Well, we're guessing maybe he thinks they cancel each other out or something.

Lauren Conrad, who also stars in some MTV TV show called "The Hills" and another show about Laguna Beach, drives an Audi R8. Is it just us, or did she just become really hot to us? No wait, it's the R8.

Hayden Christensen's enjoys cars when he's not playing Luke's dad. He even sometimes runs his Ferrari 360 in rallies. That is, when he's not having "engine trouble."