Country super star Taylor Swift is the latest star to don the Milk Mustache as part of the Body By Milk campaign, and ET is going behind the scenes of her fun photo shoot!  Plus, find out what she has to say about her new album!

The 18-year-old star, recently linked with Joe Jonas, has a busy schedule and is the perfect poster girl for good health as she juggles her time between graduating from high school, becoming a Billboard chart-topping singer and scoring the CMA nomination for Female Vocalist of the Year. In addition to drinking milk and eating right, she likes to practice yoga to stay in great shape.

"Signing on for the Body By Milk campaign is something I was really floored that I was offered," says Taylor. "Anything that promotes good health is something that I believe in. Drinking milk is a priority for me."

And Taylor's getting personal with her fans: Teens can log on to www.bodybymilk.com and upload a video of themselves interviewing the country super star. Taylor will then respond personally to ten teens and pick one lucky fan to win her autographed acoustic guitar!

Watch ET for more with Taylor!