Microsoft announced today a series of summer events called Zune Live at the BBQ which aim to “celebrate hip-hop music and the community that surrounds it.” Here are the details on tickets and artists:

The concert hits Los Angeles on July 12, Chicago on July 22, and New York City on Aug. 4. Viral invitations will be sent to fans, and they will be asked to register at a special Web site to receive their ticket.

Artists confirmed to participate in Live at the BBQ include Common, David Banner, UGK, Mos Def, Bilal, Clipse, Collie Budz, E-40, Cham, and Large Professor.

Viral invitations? What does that even mean?

Looks like it doesn’t matter. All you have to do is register at the Zune Live at the BBQ website. You need to give your name, email, date of birth, and phone number.

If you’re in one of the three lucky cities, have fun!