And you thought bunny ears were reserved for halloween parties and playboy stars! Oh no, as soon as Marc Jacobs introduced the Louis Vuitton headpieces on the runway for Fall '09, celebrities, chain stores and stylists all took note. And why wouldn't they? The playful ears are fashion's funnest accessory for a long time.

Madonna embraced the trend, wearing the ears to the 2009 Met Gala as well as part of her starring role in the Louis Vuitton ad campaign (you can check out the making of here, where Marc himself explains where the trend came from). The Olsens, Lady Gaga and Lily Allen also jumped on the bandwagon, choosing Maison Michel lace mesh ears to mix things up a bit. I know they're a little kooky, but bunny ears do add a certain je ne sais quoi to an outfit, making them perfect for our Craziest Trend of 2009 Award!