Red-Carpet Fashion at the Ninth Annual UNICEF Snowflake Ball

Although there were 18,000 snowflakes at the gala, these are the stars that really dazzled throughout the night.

Well, UNICEF Goodwill Ambassador Katy Perry definitely got into the holiday spirit last night in this deep-red, velvet, Naeem Khan halter dress and cape. We're a little iffy on her arrival outfit, but the hair and makeup are a home run!

Now this is more like it! Katy wowed in a one-shouldered, silver, embroidered Michael Kors gown for her performance. Nailed it!

Christina Ricci is winning on all levels in this Carolina Herrera creation and Harry Winston diamonds. Seriously stunning.

Katie Couric opted for an embellished gold Dennis Basso dress for the evening.

While Nell Diamond went for a sexy vibe in this green silk dress with a high slit.

Angie Harmon embraced the Snowflake theme in a flowing white Angel Sanchez dress with a black draped top.

And VS supermodel Lindsay Ellingson donned a body-flattering Sophie Theallet sheath.