21st Street Games held Nyan Cat’s first birthday party in their NYC studio, with Nyan Cat creator Chris Torres (Prguitarman) there to celebrate 1 year of Nyan Cat on YouTube. Over 6,000 people watched live on USTREAM, we got tweeted by @YouTube and got love from Mashable and MSNBC. Nyan nyan nyannyan! Show your love: #HappyBirthdayNyanCat.

Awesome still photos here.