Who Is the Biggest Celebrity Pothead?

Willie Nelson's mug shot (AP)

This probably won't come as a huge shock, but legendary country singer Willie Nelson was arrested and charged with marijuana possession on Friday after six ounces of pot was found aboard his tour bus in Texas, a U.S. Border Patrol spokesman told the Associated Press.

On Friday morning, an officer smelled pot when Nelson's tour bus pulled into a Sierra Blanca checkpoint at 9 a.m.

A suspiciously early hour for such an odor to be eminating from a vehicle.

Marijuana was discovered during a search of the bus, patrol spokesman Bill Brooks told the AP.

SODAHEAD SLIDESHOW: See the biggest celebrity potheads.

Sheriff Arvin West told the El Paso Times that Nelson said that the marijuana was his.

The singer was held briefly on a $2,500 bond before being released.

Nelson, 77, has made no secret of his love of ganja. The outspoken advocate for the legalization of marijuana was busted at a traffic stop in 2006 for one-and-a-half pounds of pot and a bag of mushrooms.

He entered a guilty plea and was fined $1,024 and placed on probation for six months.

But Nelson is far from the only celebrity to get caught green-handed.

From Matthew McConaughey to Woody Harrelson, who do you think is the biggest celebrity pothead?