Will Ferrell

We’ve already told you about the all-star lineup of presenters and performers who will be at the 2011 Do Something! Awards this year, a list that includes Adam Lambert, Victoria Justice, and Nick Cannon, to name a few. But just today we learned of a few more A-listers who will be on hand at the show and if we can be quite honest, this list? It’s insane. Check out the full roster of attendees and presenters after the jump! The Do Something! Awards air on Thursday, August 18 at 9 p.m. ET/PT.

Oklahoma country music stars Reba McEntire and Blake Shelton have received a Do Something Award nomination for their pair of home state charity concerts that raised $500,000 for tornado relief efforts in Tushka. In addition, the hit NBC reality TV show “The Voice,” which features Shelton as one of its four superstar coaches and included McEntire among its first-season celebrity advisers, has been nominated for a Do Something Award.

DoSomething.org has announced the official voting period for the 2011 Do Something Awards opens today July 11, 2011 at 9am ET at DoSomething.VH1.com and extends through August 14, 2011 9am ET. Fans now have the opportunity to vote for their favorite celebrities who do great work and who inspire young people to do great work too.