Remember when Miley's mom gifted her Porsche to her daughter for her 16th b-day? It's only been a few months, but Miley's sick of it already! "I didn't like it 'cause it was bad for the environment, and it was too big," Miley says in a video on her website. "My dad surprised me last night with a black Prius." Good for Miley for staying green! What's she think of her new ride? She says it's better for the environment and "adorable!" How will she pimp it? "I'm gonna get Hello Kitty floor mats!" Sounds like an upgrade! Which car would you choose: the green option or the hand-me-down Porsche?