A cool summer breeze is bound to cause a wardrobe malfunction for any female artist brave enough to perform outdoors!

That's what happened to Taylor Swift in St. Louis this past Saturday.  A few stanzas into her hit song, 'You Belong With Me,'  her blue dress flew-up around her waist exposing her undergarments.

Impressed as I was with her class act performance at Van Andel in Grand Rapids ... she kept on singing as if it was part of her performance.

At one point, Taylor grabbed her skirt and shook out one of the ruffles that was still exposing her backside.  Talk about taking it in stride.  It seems like nothing phases or surprises her.  And one thing is for sure ... this was not a calculated, planned exposure. It happened naturally and she handled it professionally.  How refreshing, don't you think?