Diet Dr Pepper TV Commercial, 'Turnin' Up the Sweet' Featuring Justin Guarini

A man tells his wife he set up the thermostat when suddenly, a small man named Lil' Sweet rolls out from a vent in their wall. Justin Guarini as Lil' Sweet croons to the man that his hard work deserves a sweet Diet Dr Pepper. He then asks if it is hot in the room or if it was just him. The thermostat starts beeping as the temperature quickly rises on the digital face.