Behold the Will.i.AMG, a one-off car developed by Will.i.am in partnership with Mercedes-Benz AMG. The actor and singer is actually a brand ambassador for AMG’s new electrified lineup, starting with the 2023 GT 63S E Performance 4-Door Coupe, so it’s no surprise that the GT 4-Door Coupe is actually the basis for the custom ride. You’ll notice…