Molly Sims looked cool and casual while traveling in her black leather moto jacket paired with Isabel Marant 'Ulano' crystal-embellished jeans ($1,590 at netaporter.com).

Blake Lively wore a denim blue wrap dress, oxblood leather trench and embroidered over-the-knee boots while doing a press tour for her new movie 'All I See Is You.'

Selena Gomez is killing it lately with her retro modern style, seen here in a brown leather jacket, black sweater, high-waist jeans and patent loafers.

Alessandra Ambrosio looked cozy and chic in her Ellie Mae 'Celine' nubby knit cardigan ($380, elliemaestudios.com) paired with crop jeans, white sneakers and Louis Vuitton bag. The perfect fall look for traveling, class or running errands.

If your style requires more than simple jeans and a t-shirt, maybe model Karlie Kloss can be your muse. She gave fans major fashion inspo when she arrived at the Dior Show during Paris fashion week in a black tulle maxi skirt, white bandeau top and zippered utility blazer.