Selena Gomez and Jimmy Fallon duet on 'Mario Kart Love Song'

Selena Gomez stopped by "Late Night with Jimmy Fallon" Tuesday night (March 19) to promote "Spring Breakers," her new grown-up romp co-starring Vanessa Hudgens and Ashley Benson. Gomez describes it as, "They go on spring break and do a lot of bad things."

But in addition to the interview, Gomez lent her golden pipes to a duet with Fallon on "Mario Kart Love Song," which was kind of awesome.

Lyrics include: "You be my Princess and I'll be your Toad. Follow behind you on Rainbow Road ... You be my Toad and I'll be your Peach. Follow behind you on Koopa Beach." Delightful.

Below, Fallon shares a spring break story about himself and six guys sharing a hotel room and basically getting into shenanigans. Makes you kind of nostalgic for your early 20s, no?

"Spring Breakers" opens nationwide March 22.