Taking place at New York hotspot Tenjune, DJ Cassidy was on hand to spin the tennis champion’s favorite dance tunes at the invitation-only event for the three-time Grand Slam winner.
Among the celebrities on hand were Michelle Trachtenberg and Dave Annable, along with designers Vera Wang, Doo.Ri and Brian Wolk and Claude Morais of Ruffian.
During the night’s festivities, TAG Heuer President and CEO Ulrich Wohn toasted the 21 year-old before presenting her with an elegant white and pink eight-tier cake, saying:"Maria is part of the TAG Heuer family and we are honored that we were able to celebrate this special day with her. To have accomplished so much by this age is truly amazing and the embodiment of TAG Heuer’s ‘what are you made of?’ principle.”
And of her big birthday bash, Maria said: “I couldn’t think of a better way to celebrate my 21st birthday than being in New York with all of my close friends!”
Lara's Wardrobe Cam
Click here to watch: HTV Raw videos!
Who's has the best shoe collection?
Test Your Knowledge
Challenge: Who's That Star?

It has been confirmed that there will be a sequel to the Sex and the City movie. What are your thoughts?
