Watch Justin Bieber Show Off His Street-Racing Skills on 'Fallon'

Bieber teams with reigning NASCAR champ Kevin Harvick to dominate 'The Tonight Show 500'

On Sunday, NASCAR will crown its Sprint Cup champion when Kevin Harvick, Jeff Gordon, Kyle Busch and Martin Truex Jr. ­– the four drivers still alive in the Chase for the Championship ­– compete at Homestead-Miami Speedway in a winner-take-all showdown.

But before they hit the track, they got in a few test laps in The Tonight Show 500.

On Tuesday night's show, Jimmy Fallon was joined by NASCAR's biggest stars, as well as Justin Bieber, Jesse Tyler Ferguson and the Roots' Black Thought for an old-fashioned go-kart race (we know how much Fallon loves Mario Kart, after all). Using New York's Rockefeller Plaza as a playground – no wonder we couldn't leave work yesterday – Fallon split the group into two teams, leveled the playing field by pairing each celebrity with a Sprint Cup finalist and basically let them run wild.

The rules were simple: Each car had to weave through a number of cones, switch drivers at the end of the first leg without leaving the vehicle and tag their teammates upon return. The first team to get both their cars across the line won. And much to the delight of the hundreds of screaming teenage girls watching from the sidelines, Bieber and Harvick won it all.

"I've learned a lot about street racing," said Bieber, who dodged jail time after being arrested for an illegal street race in 2014.

Seeing as Harvick won The Tonight Show 500 and was handpicked by Koda, a two-year-old cheetah from Miami, to win the Sprint Cup championship, he's probably the favorite to win it all at this point.