Justin Timberlake's William Rast Clothing Line

Justin says he loves to see women wear a mix of sexy and tomboy looks...a style his girlfriend, actress Jessica Biel, is known for. "She's obviously a huge muse for me and with the designers too," he says.

In keeping with this style, the first model is wearing William Rast's black leather jacket with studs and "Jerri" skinny jeans in Rosewood wash.

Every woman should have a good pair of jeans and a leather jacket in her wardrobe, Justin says.