If you're looking to elevate your holiday outfits instantly, red lipstick is the easiest place to start. It delivers a bold pop of color without the price tag of a new sweater - and it's a beauty staple you can wear on repeat. And when it comes to finding the ultimate shade, we're taking notes from Taylor Swift. The pop star is famously loyal to a classic red lip she wears on and off the stage. Her go-to shade? According to Hello! magazine, it's MAC's Retro Matte Lipstick in the shade 'Ruby Woo.