Selena Gomez Takes ‘Carpool Karaoke’ to New Heights With Roller-Coaster Detour (VIDEO)Selena Gomez Takes ‘Carpool Karaoke’ to New Heights With Roller-Coaster Detour (VIDEO)Plus, the commuter-duo makes a pit stop at McDonald's, where Gomez finds her lyrics have become a part of the Golden Arches.Matthew Scott DonnellyMatthew Scott Donnelly