Heidi Klum: From Saucy to Soccer Mom

Heidi Klum has range ... she was a doting mom Saturday, watching her son play sports, just days after hanging out topless on a beach.

Heidi was all thumbs up, cheering on her kid, Henry.

You'll recall, earlier in the week she was cavorting in St. Tropez with BF, Vito Schnabel.

Why can't all moms be this way?