Rock the Bells, the annual traveling hip hop festival, has released its full line up today (4/16). Kid Cudi, Nas, and Wiz Khalifa are the headliners, but the performance from 5-time Grammy winner Missy Elliott promises to be a special one. Elliot suffered a bout of Graves’ disease last year and will only be making an “exclusive North American festival performance” for Rock the Bells; she will be accompanied by Timbaland for the set.

Check them out in NYC releasing a new untitled song together last month.

Also on the bill is J Cole, Atmosphere, and many others. Bone Thugs N’ Harmony will be reuniting for a 20 year anniversary as well as making a very special tribute to Easy-E.

Rock the Bells will be sliding through San Bernardino, CA on Aug 18-19, Mountain View, CA. on Aug. 25-26, and Holmdel, New Jersey on Sept. 1-2, the internet presales will start this Friday, May 18th.

Here’s the 2011 wrap-up from the RTB team: