Watch Lonely Island, Roots Play 'I'm On a Boat' With Kids' Instruments

Andy Samberg, Jimmy Fallon also play "Catchphrase" with Gigi Hadid and Bryce Harper

The Lonely Island dropped by 'The Tonight Show' Monday to perform "I'm On a Boat" with kids' instruments alongside Jimmy Fallon and the Roots.

Andy Samberg and the Lonely Island dropped by The Tonight Show Monday to perform the troupe's classic "I'm On a Boat" with children's instruments alongside host Jimmy Fallon and the Roots. With everyone in sailor costumes – except Lonely Islander Jorma Taccone, who wore a dunce cap while reading the book The Joy of Land – the crew turn the opulent Incredibad anthem into a ragtag sing-along.

Samberg was promoting the Lonely Island's upcoming comedy Popstar: Never Stop Never Stopping, and in addition to the "I'm On a Boat" and the interview portion of the visit, the former SNL star joined Fallon and fellow guests Gigi Hadid and Washington Nationals right fielder Bryce Harper for a round of Catchphrase.

Samberg and Hadid squared off against Fallon and Harper. However, when the unanimous 2015 National League MVP is tasked with the clue "Eager Beaver," he's thrown a pitch that he just can't hit. However, thanks to Harper's own ignorance of the rules, he and Fallon still somehow win.

Later in the show, Samberg explains that promoting a film can be a monotonous affair. During The Tonight Show interview portion, Samberg said he makes press more interesting by sneaking Fallon's name into every press junket to sit down for.