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Heidi Klum (Almost) Bares It All

Heidi Klum keeps on giving us more reasons to love her.
/ Source: E!online

Heidi Klum keeps on giving us more reasons to love her.

The latest?

She's helping promote the sale of a new grey sweatshirt benefiting Stand Up to Cancer by posing for a PSA in nothing but--what else?--the grey sweatshirt.

Proceeds help support SU2C's funding of accelerated cancer research.

"Heidi is standing up for family and friend who have battled cancer," the PSA reads. "Who will you stand up for?"

PHOTOS: Do-Gooder Gallery