VIDEO : Hayden Panettiere Newest Sexy Celeb to star in Carl's Jr. Commercial

Hayden Panettiere sure is turning up the heat! The 26-year-old Nashville actress currently stars in a new Carl's Jr. commercial to promote the fast food chain's Midnight Moonshine Burger. Sporting a cleavage-baring black button-down top tucked into matching shorts, Panettiere bites into the massive sandwich inside what appears to be a distillery as a fire rages in the background with Jessie James Decker singing in the background.