Sometimes the best substances that work wonders on skin come from unexpected places. Enter birch sap, otherwise known as birch juice and birch water. A common component of many Korean beauty products (and now in the West), it's derived from birch trees and "has an abundance of amino acids, enzymes, antioxidants and minerals that help your skin retain moisture and protect the skin barrier function," according to Charlotte Cho, founder of popular K-beauty site Soko Glam. It's also said to provide more hydration to skin than hyaluronic acid, which has long been lauded for its moisture-boosting abilities.

Here's what's filling our carts this month: foundation for every skin tone, the sexiest, shimmeriest body oil and a targeted treatment that will have your brown spots running scared.

It's the season of high-cut bikinis and tiny denim shorts. With more flesh on display, it might make you realize that your current beauty routine is a bit, um, face-centric and you'll be looking for products to show all areas of your body a little tender loving care. One area that deserves its own attention is your bum.

Beauty products come and go on the market every day. Even some of our main staples sadly disappear from store shelves. But it's the ones that last through the years, and even decades, that leave us in awe. Not only is this a sign that they're effective and high quality, but that they're using ingredients that are safe, healthy and beneficial for our skin.

Could Paris Hilton be the next Kate Somerville? The multi-hyphenate heiress has just launched Paris Hilton Skincare ProD.N.A., marking her first major foray into the skin care world.