We can't believe it either, but today is Noah Cyrus 15th birthday. It seems like just yesterday she was a little kid going to glam red carpet events with her big sis Miley, but now she's a stylish teenager with a total edgy sense of style. To celebrate her birthday and look back on just how much her style has evolved over the years, we've rounded up 15 event pics that are sure to make your jaw drop.
Click through the gallery above to watch Noah grow up right before your eyes. Then, make sure to wish her a happy birthday in the comments section below.