Swimsuit model Nina Agdal sizzles on the beach promoting the latest sandwich from US fast-food chain Carl's Jr. and Hardee's.

Nina chows down on the charbroiled burger while taking her bikini top off to get a better tan line.

Nina can be seen devouring a burger while oiled up in a black string bikini on the beach.

The 20-year-old alternates between lathering herself in tanning lotion and tucking into the fast food chain’s Charbroiled Atlantic Cod Fish Sandwich.

Here's a bonus shot of her...

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 Here's a behind the scene look at the shoot!