I don't care what people say; I LOVE denim on denim.
The Texan Tuxedo! Okay, okay... Before anyone says anything, make sure the blues look good together. You can either dress denim on denim up or down. Bell bottoms with a lace black top and a jean jacket or cute flairs with a sweatshirt and a jean jacket. No matter the way you go, it'll look cute as heck.