Katy Perry has certainly changed quite a bit over the years. Some ways for the good, others that make us question her conduct a little (LOL, but we gotta love everything she does)

Vintage footage has surfaced of her when she was 17 years old, and on tour for the first time with songs that fit the genre of Christian Rock. (Quite a difference from This Is How We Do)

Katy admits getting nervous before performing, says she loves touring, discusses her love of Patty Griffin and Bjork, and calls herself a "pizza face."

We love you Katy. Check out her former look below!