'Footloose' star Julianne Hough revealed her go-to ab exercises for the November issue of Self Magazine.

During her interview she said, “My go-to prebikini flat-ab move is the plank, all different types.”

The basic forms include getting in a pushup position (traditional plank), resting the on the forearms (forearm plank), holding completely straight while trying to holding in the abdominal muscles (side plank).

Click HERE to see Matthew McConaughey show off his fitness side!