Covergirl's newest ambassador is Taylor Swift, and the singer has been fulfilling her promotional duties with Refinery 29 who filmed her at backstage at the Covergirl advert shoot. For the advert Taylor tries on four different persona's created with CoverGirl products including rocker, which I love but am not sure it's totally suited to her. We're loving her Boho country look though, using the Line Exact which she describes as being like eyeliner in a marker. Taylor reveals that actually she's not stranger to using markers as eyeliner actually. She told them, "I once used a Sharpie as eyeliner in an airplane bathroom because I didn't have any with me. I don't recommend it."

Taylor also discussed her most famous asset: her hair. When we were introduced to her the star usually sported beautiful corckscrew curls, but as she's got older she' started to switch between straight and curly. "I decide based on what I'm doing on any given day," says Taylor. "Lately, I've been doing my hair in a way that's sort of a combination of the two, smooth on top with a loose curl at the bottom. My go-to easy hairstyle at the moment is a ponytail with some kind of headband or scarf."

Check out behind the scenes with Taylor above!