Heidi Klum Shirtless Under Fur Coat Teasing New Song With Diplo

Heidi Klum never met a top she didn't want to immediately take off ... and she's using her love for the nude to push a new musical venture.

The supermodel is promoting her new song with Diplo by, you guessed it, going topless ... which is her signature move.

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In a social media post teasing the upcoming track, Heidi is letting the girls breathe under a white furry coat ... and she's wearing some sexy lingerie bottoms, along with some knee-high boots.

The song is called "Red Eye" but Heidi isn't on a plane here ... instead, she's got boots on the ground ... in the middle of some train tracks. Makes sense.

Heidi says the new song is for the 21st season of "Germany's Next Topmodel" ... and it's available to stream February 13 ... the day before Valentine's Day.