Now that denim is the “new black”, there’s no need to get into a style rut with your daily denim jeans and t-shirt ensemble. Katie Holmes, showed off her casual chic denim and white tee look today while taping the Late Night with Jimmy Fallon show. (photo: Theo Wargo, Getty) For everyday style, we’ve put together a few looks for our favorite denim jeans and t-shirt combo. The gold standard for the classic white t-shirt, is of course, a Hanes women’s…