The Lonely Island, Jimmy Fallon & The Roots Play 'I'm On A Boat' On Children's Instruments On 'The Tonight Show'

The viral comedy rappers behind internet hit "Jizz In My Pants" are back, ready to promote their new parody movie 'Popstar: Never Stop Never Stopping' - and they dropped in to 'The Tonight Show' to hang out with Jimmy Fallon on Monday night.

Akiva Schaffer, Andy Samberg, and Jorma Taccone of The Lonely Island donned some adorable outfits with Fallon and his in-house band The Roots to perform a rendition of their nautical hit 'I'm On A Boat' using nothing but kids' classroom instruments.

Here's the original music video from 2009, which has a whopping 94,000,000 views on YouTube.