This must be the new Britney!The 31-year-old pop star decided to spice up her style for Sunday mass when she rocked a short tight black mini-skirt with matching heels to church in Calabasas.The Scream & Shout singer managed to keep the upper half of her outfit conservative in an embroidered beige shirt but it's been anything but that in regards to her professional and personal life.With her no longer engaged to Jason Trawick and opting to quit her X Factor gig, she seems to be making some drastic changes, and we're hopefully for the better!