Leslie Mann scored a perfect 10 at the premiere of This Is 40 last night. The actress sported a messy bun, which she polished off with a black ribbon and bow, along with a gorgeously gilded manicure. Both looks are surprisingly simple to pull off and pair perfectly for a sweet holiday party look.

To create a similar updo, start with a texturizing spray like Ulta's Beach Babe Texturizing Spray ($6) and tease the hair to build more texture and create lots of volume. Next, sweep your hair into a ponytail and don't pull your hair all the way through on the last loop of your hair tie. Grab a velvet or grosgrain ribbon you can find at a craft store and wrap it around the circumference of the bun, tying it in a bow at the base. Use pins to secure the ribbon and clean up any flyaways from the bun.

For the nails, start with a gold base coat, like GoldenEye by OPI ($9). After applying one coat, reach for a top coat with large gold glitter, like Deborah Lippmann's "Boom Boom Pow" ($20). Apply two coats and finish with a top coat. Your nails will sparkle in their gilded glory. And when paired with your sweet hairstyle, you'll be ready to take the party circuit by storm.