Jimmie Johnson Do You or Do You Not ... PEE IN YOUR RACE CAR?

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It's the biggest question Daytona 500 champ Jimmie Johnson -- and every other NASCAR driver -- faces during a grueling 3-4 hour race ... HOW DO YOU GO TO THE BATHROOM??? And JJ actually gave us an answer.

Jimmie -- who was out in NYC yesterday -- told TMZ, "Some guys just go." Yes, in their pants.

But the 5-time Sprint Cup champ adamantly denied ever wetting himself, adding ... "I never have. Of course I wouldn't do that."

SURE YOU WOULDN'T.

As for whether Jimmie ever gets carsick -- the answer is yes, but you'll be shocked to hear how and when he goes green ... in the face.

Van Halen Singer: I Was ABDUCTED By Aliens!

Former Van Halen front man Sammy Hagar has officially spaced out -- in fact, the guy actually claims he was abducted by real-life aliens several decades ago ... in Fontana ... and they had their way with his brain.

Hagar tells MTV, “It was real. They were plugged into me. It was a download situation … or, they uploaded something from my brain, like an experiment ... They were tapped into my brain and the knowledge was transferred back and forth."

Hagar insists the whole thing went down in Fontana, CA -- home to a NASCAR track.

According to the ex-rock star, it wasn’t his first extra-terrestrial experience either -- claiming he saw his first UFO when he was just four years old, hovering over a field near his home.

And just so we're clear, this isn't a joke -- Sammy insists, "That happened. That friggin’ happened."

Danica Patrick Crash and Burn

Race car hottie Danica Patrick made her NASCAR Nationwide Series debut today, but she didn't make it to the checkered flag -- a wreck on lap 68 knocked her out of the race.

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Patrick's green #7 got caught in a pileup coming out of turn four at Daytona International Speedway, and she couldn't avoid the wreckage in front of her.

At least she got her first Daytona wreck out of the way.

And at least she's still hot.

Speed Freak Danica Patrick Busted Again

Indy race car driver Danica Patrick has yet to learn that the funny little pedal on the left is the brake.

Cops confirm Patrick was busted earlier this month in Scottsdale, Ariz. for driving 54 in a 35 -- 19 over the speed limit -- which bested her last run-in with the fuzz where she was going 57 in a 40 -- only 17 over.

Danica received a citation and is due in court at the beginning of January.

Those Women Drivers...

Danica Patrick isn't just dangerous behind the wheel of an Indy car, cops say she also posed a threat on the mean streets of Scottsdale, Ariz.

Court docs which show the race car diva was popped by Scottsdale P.D. back in January for doing 57 in a 40 mph zone. But here's the kicker -- Danica was ordered to take defensive driving school to get the ticket dismissed!

Guess the class worked -- because 40 days after Patrick finished her court-ordered traffic class, she won her first Indy race.

Those Red Asphalt videos really do work!