Katharine McPhee, the 2006 'American Idol' runner-up and current 'Smash' star (well, as long as it stays on the air anyway), probably never expected some wind in Los Angeles to make it look like she was hula-hooping with her dress.

But that's exactly what that sassy-pants wind did anyway.

While filming the Anna Farris comedy 'The House Bunny' in 2007, McPhee flashed her derriere, clad in some cute pink undies -- making it pretty much the most adorable wardrobe malfunction ever.

Because as far as these things go, it's pretty much perfect.