Snoop Dogg and Wiz Khalifa dropped by 'Late Night with Jimmy Fallon' last night (Dec. 5), where the stoner duo performed their new single 'Young, Wild & Free,' from the upcoming cannabis comedy 'Mac and Devin Go to High School.'

Introducing themselves in character as Mac and Devin, Snoop and his pothead protégé blazed through their new single, with live support from The Roots, who more than made up for the absent Bruno Mars on the hook.

Following their 'Fallon' taping, Wiz and Snoop headed over to NYC's Terminal 5 venue, where they performed the first of six shows on their High School Tour, which lands in Philly this evening, and wraps up in Snoop's native L.A. on Dec. 13.

The soundtrack for 'Mac and Devin Go to High School' hits shelves on Dec. 13 as well, with the film coming some time in 2012.

Watch Snoop and Wiz Perform on 'Late Night with Jimmy Fallon'

Watch 'Interview with Snoop Dogg'