Hollywood was out in force last night hitting the red carpet premieres of Lovelace, the biopic of 70s porn star Linda Lovelace, and Planes, an animated Disney feature. Celebrations of the two films from opposite ends of the genre spectrum called for very different attire, with Gucci cocktail dresses and a little side-boob at one and dressed up jeans at the other. See our six favorite looks from the night in this L.A. edition of Monday's Best Dressed Guests.