The 23-year-old actress - who plays cheerleader Brittany Pierce in the show - was recently signed by the cosmetic company to represent its various brands and says it's a dream come true because she's always been a fan of their products.
She said: "It's trendy, happy, young, hip. It just seemed to fit perfectly."
However, while Heather - who will promote Flirt! both online and in-stores starting in February - already uses all The Firm's products she admits there's a lot of cosmetics involved in her beauty regime.
She quipped: "I don't remember what I'm supposed to do when I get home!"
Julie Howard - senior vice president of global marketing and brand development for Flirt's parent company BeautyBank - recently praised Heather saying the blonde beauty was the ideal person to represent Flirt!.
She said: "Heather is a perfect fit for the Flirt! brand. She's fun, playful, young and talented."