Something you may have seen floating around Pinterest is this take on the two-toned lip trend. It offers a playful way to use vibrant lip shades, while also keeping your look fun and youthful.
The toughest decision you'll have to make when recreating this look is what two colors to use. I opted for two pinkish-red shades, but you could choose anything you'd like. I've seen this done with every color from shocking orange to deep, moody black; it's really just based on your preference.