Shawn Mendes, James Corden Go Way Overboard in NYC Subway Busker Battle (Video)

All the way from Los Angeles

Getting your Trinity Audio player ready…

James Corden just encroached on Shawn Mendes’ Broadway-Lafayette St. B-D-F-M-6 New York City Subway turf.

The “Late Late Show” host showed up early to sing a little “You’re Beautiful” by James Blunt for commuters’ coins, but the whole thing turned into a busker cover battle when Mendes arrived to reclaim his usual Wednesday spot.

Starting with some Oasis, Mendes earned the Los Angeles-based CBS studio audience’s screams right off the bat. Temporarily defeated, Corden exited stage left — but he returned swiftly in a shiny tux jacket and playing a baby grand piano. That’s when he flipped the kid the bird in between “Great Balls of Fire” lines.

Not to be outdone, Mendes traded in his t-shirt and acoustic guitar for a hoodie and full DJ setup.

Corden answered that shrewd move by becoming all five of the Backstreet Boys at once — but Mendes had one more huge trick up his sleeve.

Watch the video above.