Now that we've entered the coldest months of the year, it's time to re-evaluate our haircare regimens. Frigid temperatures usually result in dry locks, frizz, and other not-so-glamorous issues. However, that's not to say these predicaments can't be solved lickety-split with a few standout products and smart tips from experts. While we love getting the scoop from hairstylists on the best new products to invest in, this time around we decided to scour the web to unearth what our favorite celebrities are using in their very own cabinets. From the tool Rosie Huntington-Whiteley uses to achieve her effortless waves to a finishing spray that works wonders according to Zoë Kravitz, continue ahead to shop 11 key hair products recommended by celebs.