Maria Sharapova: Blake Lively Birthday Celebration!

Gossip Girl‘s Blake Lively and tennis champion Maria Sharapova attend a cocktail party hosted by InStyle and Tiffany & Co. at the Cooper Square Hotel in New York City on Tuesday (August 25).

Maria, 22, who has a contract with Tiffany & Co., also helped celebrate Blake‘s 22nd birthday that day with some cake.

Today, the tennis star is expected to meet with Roger Federer, Rafael Nadal, and Serena Williams in New York City for the unveiling of Nike’s newest tennis line.

FYI: Blake is wearing a TopShop dress and Jimmy Choo shoes.

15+ pictures inside of Maria Sharapova and Blake Lively celebrating the night…