By Alexis Tereszcuk - Breaking Celebrity News Entertainment Editor

Girls just wanna have some dirty talking fun!

Rocker Cyndi Lauper was the Grand Marshall for the Pegasus Parade at the Kentucky Derby in Louisville, Kentucky Thursday where she was caught on live TV dropping an f-bomb and Breaking Celebrity News has video of her profanity slip.

Cyndi was testing the mike before she greeted parade watchers, a dancing group of young school kids and the live TV audience!

“Hey!” Cyndi says to the crowd, and then thinking that her mike isn’t working says “Of course it’s not. F***ing idiot.”

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