U.S. Supreme Court Protects Ornery Boozy Celebs

Celebrities are gonna have a field sobriety day with this one ... The U.S. Supreme Court just ruled ... it's unconstitutional for cops to forcibly draw blood from someone who was busted for DUI unless they get a warrant -- or prove a damn good reason for not getting one.

The implications here are far-reaching. If someone refuses a breathalyzer ... cops may have to take the time to write up an affidavit and get a judge to sign a warrant. That time could be enough to allow the person to sober up enough so their blood alcohol level drops below the legal limit.

There's an exception in the ruling, though ... cops can proceed without a warrant if they later prove to a judge that they had a compelling reason to do so.

Just look at the partial list of celebs who have been busted for DUI ... Lindsay Lohan, Bobby Brown, Paris Hilton, Taran Noah Smith, Mel Gibson, Chris Klein, Rick Springfield, Richie Sambora, Tracy Morgan, Vince Neil, Kiefer Sutherland, Ty Pennington, Thomas Jane, Charles Barkley, Sam Shepard, Michelle Rodriguez, Mickey Rourke, Randy Travis, Nicole Richie, Haley Joel Osment, David Cassidy and Chad Kroeger.

It's a game changer ... bar none.