Heidi Klum showcased her derriere at the release party for pop starKim Petrass new single Alone, featuringNicki Minaj.

Gottmik, its worth noting, also happens to be Klums longtime friend and makeup artist.

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Heidi Klum

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RecentlyHailey Biebersported atiny white G-stringat Coachella.

Suns out, buns out, and all that!