UNICEF's 9th Annual Snowflake Ball transformed New York's Wall Street into a winter wonderland, filled with celebrity snowflakes. See all the pictures.
The UNICEF Snowflake Ball 2013 was a night laced with celebrities and sparkle as New York played host to the 9th annual celebration of the charity.
As one of New York's most respected black tie galas, UNICEF's Snowflake Ball was awash with elegant dresses, most notably Katy Perry's oriental red and gold dress with coordinating floor length cape.
Katy Perry at the 9th Annual UNICEF Snowflake Ball
On the evening, special thanks were given to Katy Perry for her commitment to the charity and she was subsequently honoured with a Goodwill Ambassador title.
Katy Perry at the 9th Annual UNICEF Snowflake Ball
On the evening, special thanks were given to Katy Perry for her commitment to the charity and she was subsequently honoured with a Goodwill Ambassador title.
Katy Perry at the 9th Annual UNICEF Snowflake Ball
Katy Perry was an oriental goddess in a red frock complete with a beautifully decorated sheer cape with gold detail.
Katy Perry at the 9th Annual UNICEF Snowflake Ball
Katy Perry looks right at home on the stage for the UNICEF event, where she was named a Goodwill Ambassador for the charity.
Katy Perry On Stage at the 9th Annual UNICEF Snowflake Ball
Katy Perry models one of the iconic blue T-shirts for the UNICEF charity - perfectly fitting for her second change of outfit.
Christina Ricci at the 9th Annual UNICEF Snowflake Ball
Christina Ricci chose a leopard print dress with contrast bodice colours, opting only for brown caramel hues on the evening.
Angie Harmon at the 9th Annual UNICEF Snowflake Ball
Angie Harmon looked classically elegant in a sleeveless dress, choosing sparkle jewellery to set off her outfit.
Katie Couric at the 9th Annual UNICEF Snowflake Ball
Katie Couric glittered in a regal gold floor length dress with long train. She teamed her look with a simple box clutch.
Nell Diamond at the 9th Annual UNICEF Snowflake Ball
Nell Diamon wore her hair long around her shoulders to complement her floaty satin dress in emerald green.
Katy Perry at the 9th Annual UNICEF Snowflake Ball
Katy Perry received special thanks for her work with the charity and just had time for a quick outfit change before attending a discussion panel.
Angie Harmon at the 9th Annual UNICEF Snowflake Ball
Angie Harmon tries the monchrome trend for the 9th Annual UNICEF Snowflake Ball, one of New York's most notable black tie events.
Katy Perry On The Stage at the 9th Annual UNICEF Snowflake Ball
Katy Perry looks cheerful on stage at the UNICEF ball as she is honoured with the Goodwill Ambassador title.
Katy Perry With The Children at the 9th Annual UNICEF Snowflake Ball
Katy Perry joins some of the heroic children UNICEF has been prided with helping over its years.
Tea Leoni at the 9th Annual UNICEF Snowflake Ball
Tea Leoni opts for a pop of colour with a cobalt blue shirt to offset her lighter blonde locks.
Tyson Chandler at the 9th Annual UNICEF Snowflake Ball
Tyson Chandler attended the 9th Annual UNICEF Snowflake Ball on New York's notorious Wall Street.
Kyle MacLachlan at the 9th Annual UNICEF Snowflake Ball
Kyle MacLachlan honoured the formal black tie dress code with a suitably dapper dickie bow.
Mark Consuelos at the 9th Annual UNICEF Snowflake Ball
Mark Consuelos looked sleek in a satin lapel suit jacket with coordinating shimmer tie.
Katy Perry at the 9th Annual UNICEF Snowflake Ball
Katy Perry embraced the special winter wonderland atmosphere in Christmassy red and gold.
Katy Perry at the 9th Annual UNICEF Snowflake Ball
Katy Perry kept her dark her simple with large curls in a retro style over her right eye.
Danny Glover at the 9th Annual UNICEF Snowflake Ball
Danny Glover looked clean cut in a dark suit to honour UNICEF's 9th Annual celebration.
Jamie Colby at the 9th Annual UNICEF Snowflake Ball
Jamie Colby channeled Hollywood glamour in red with large barrel curls to frame her face.
Henry Hager and Jenna Bushat the 9th Annual UNICEF Snowflake Ball
Henry Hager and Jenna Bushat stop for the photocall at Wall Street's Cipriani venue.