When ya gotta go, ya gotta go -- even if you happen to be in the driveway of one of the biggest movie stars ever!

Seth Rogen told Howard Stern on Monday he once relieved himself in a Snapple bottle while parked in Tom Cruise's driveway, awaiting a meeting with the perennial A-lister.

Rogen said the unlikely joining of forces came at a time Cruise was warming up to top comedians while preparing for the film Tropic Thunder.

Rocker-turned-reality-TV star Bret Michaels has another major challenge ahead of him, RadarOnline.com has exclusively learned.

PHOTOS: Bret Michaels Through The Years

The Poison frontman -- who's currently on his "Roses & Thorns" solo tour - will have soon have surgery to repair a hole in his heart, a condition which he has unknowingly had since he was born.