Justin Timberlake’s BMW on Video Driving Down Sag Harbor Street Before DWI Arrest

TMZ has found video that shows Justin Timberlake cruising down the street in Sag Harbor early Tuesday before he was pulled over by cops and arrested for DWI … and based on what he told police, it appears he was following some friends who were leading the way.

Check out this footage we tracked down from surveillance cameras in the area … it captures a black sedan heading south on Main Street — a block away from the American Hotel, where Justin left moments earlier — and a second or two later, you see JT’s vehicle pop into frame.