Valentine's Day has arrived! Whether you're going out with friends or your significant other, it's a good excuse to get dolled up. This week, pink nail art and a heart-shaped hairstyle were popular on Pinterest, while our Facebook fans were more excited to see all the trends from the New York Fashion Week runways. Oh, and did we mention Taylor Swift cut her hair? Catch up on the most social stories, and keep up with POPSUGAR Beauty on social media, including Pinterest, Facebook, Twitter, Instagram, and Google+ to stay up on all the beauty news.