Live interactive broadcast platform Ustream has been chosen to host a Yo Gabba Gabba! virtual birthday party on Sept. 9, an event that otherwise could be considered a family-friendly marketing extravaganza celebrating 50 years of Memorex. It spans a live interactive stream, a network of bloggers, Facebook-based activities, parties in selected families’ real-life homes, and additional consumer product sponsors.

Parts of the festivities are likely to bemuse those not familiar with the award-winning children’s television show. For example, one family was chosen to join the cast during the event, a decision made from among hundreds that entered the Memorex Dancey Dance video contest on Facebook. Only fans of the Nick Jr. show would understand the finer points of the program’s regular feature Dancey Dance, which has been individually interpreted on the show by Jack Black, Mia, Andy Samberg (pictured), Elijah Wood and other guests.

“Sharing the party on Ustream means families from across the country can join in the fun,” said Scott Schultz, who co-created Yo Gabba Gabba! with Christian Jacobs. The show is produced by The Magic Store and Wildbrain Entertainment.

Throughout the event, which starts at noon CDT, Yo Gabba Gabba! characters will take turns at the computer, chatting with viewers and answering questions. The stream will last 20 minutes, and then will continue on a loop at Ustream’s site until noon CDT on Sept. 16. Additionally, bloggers are encouraged to embed the Ustream video on their own sites.

Related Links:

Picture of Andy Samberg on Yo Gabba Gabba! courtesy of Nick Jr.