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Justin Bieber isn’t the only celebrity to collaborate with OPI. Katy Perry and Serena Williams have teamed up with the nail brand to create their own polish lines, too. Katy Perry’s collection has four bold shades that pack a lot of sparkle–just like the punchy singer. Serena Williams’ Glam Slam collection will be released in pairs throughout the year in accordance with the Australian Open, the French Open, Wimbledon, and the U.S. Open. Believe it or not, Serena is a nail fanatic! The tennis star is working to receive her nail technician license and dreams of someday opening a nail salon of her own.

Both collections will hit stores in January. We can’t wait to get our hands (and nails) on them! Get a sneak peek at the star-approved shades by clicking on our gallery now.