Matthew McConaughey and Snoop Dogg jam out to Willie Nelson to celebrate 420

Matthew McConaughey marked 420, the unofficial holiday celebrating marijuana, with his friend Snoop Dogg. He was cruising in a fancy ride, just like in his commercials for Lincoln, but this time he was having a lot more fun. The movie star and the creator of cannabis brand Leafs by Snoop, sang along to songs including "On the Road Again," by pro-marijuana country music legend Willie Nelson, and the rapper's own "Drop It Like It's Hot." They even pull up to a Carl's Jr. and ask the woman helping them at the drive-thru to sing with them.