Sports Illustrated's 2012 Swimsuit Issue cover girl Kate Upton is turning up the heat — big time! — in a new ad for Carl's Jr.
In the promo, the model feasts on the fast-food chain's new Southwest Patty Melt and heats up, literally, with each bite. Upton eventually cools off by stripping down and taking a big gulp of soda.
Watch the video below: