Miley Cyrus is officially making a bang with her fourth studio album Bangerz, which hit iTunes and stores today. The 20-year-old singer isn't a stranger to the news and since June, she has been making headlines with her latest album when the first single, "We Can't Stop" hit the airwaves and her music video quickly became the most viewed on Vevo in just 24 hours. And who could forget her twerking performance at the VMAs followed by the release of her boundary-pushing video for the ballad "Wrecking Ball?" Long before her midriff-wearing and punk rock crop days, Cyrus was just a 13-year-old who landed the bubbly lead role in Disney's Hannah Montana alongside her father, Billy Ray Cyrus. Click through our gallery to see her transformation of our favorite 13 photos of the star, and be sure to check out her Bangerz album available on iTunes right now.