We keep tabs on the products celebrities are using so you can stay in-the-know. Check out the up-and-coming brands stars are loving right now:

Keratin Complex
Derek Jeter's fiancée, actress Minka Kelly, is a fan of this line of this Keratin-based haircare. The latest addition is a mini travel iron that instantly heats up with ceramic/ionic technology for touch ups on the go. We love the miniature throw-it-in-your-suitcase size, as well as the included heat-proof roll bag.

Switch Flops Ballet Flats
The craze began with the original flip flops -- genius sandals designed to be worn with interchangeable velcro straps, so you can instantly switch off one pattern and on with another. Now, the latest offering by the brand is a line of ballet flats that offer embellishments like flowers and crystals that can easily be switched on or off to the tops of the shoes. Jennifer Love Hewitt and Mya are already fans.

WEN Haircare
The list of Chaz Dean's salon clients who use this all-natural haircare line (one of the first to be sulfate-free) reads like a who's who of Hollywood. Nicolette Sheridan loves the Fig Cleansing Conditioner (a moisturizing, foam-free shampoo cream) and Rebecca Romijn uses the Lavender Volumizing Treatment Spray.

Leila Lou
Jennifer Aniston requested 6 bottles of this floral roll-on fragrance while filming "The Bounty." Perhaps the freesia and pear-based scent helped her get into character? The blend includes essential oils of jasmine, vanilla, and musk, and is the debut fragrance from cosmetics company Rosie Jane. Kate Bosworth, Debra Messing, and Kristen Bell are also fans.

Piperlime Celeb Gift Lists
Celebrities like to shop online, too. After all, they get mobbed by paparazzi when they try to buy a cup of coffee! So in honor of our favorite stylish stars, online shoe retailer Piperlime is rolling out celebrity shopping lists all through the holiday season. See what stars like Kristen Bell and Brooke Shields picked out as their must-have items on the site.