During tonight's CMT Disaster Relief Concert (Thursday, May 12), which benefits those in the south hit the hardest by the recent tornadoes, President Obama will deliver a special call-to-action message.

The special 90-minute concert will also feature guest appearances by Taylor Swift, Shania Twain and Carrie Underwood, all having filmed messages asking viewers to take action by donating to help those in need.  The Blind Boys of Alabama and Gretchen Wilson have been added as performers, while Big and Rich's Big Kenny, actress Courtney Cox, TV host Ellen DeGeneres, actress Nicole Kidman and University of Alabama football coach Nick Saban will offer messages from the heart. ESPN reporter Erin Andrews, HLN anchor Robin Meade and comedian Ron White will all serve as co-hosts.

Previously announced performers on the special include Hank Williams Jr., Lady Antebellum, Keith Urban, Tim McGraw, Sara Evans, Alan Jackson, Trace Adkins, Alabama, Little Big Town and Ronnie Dunn.

Besides the live performances and guest appearances, the moving special will highlight a number of regions affected by recent storm, tornado and flooding damage, including Tuscaloosa and Birmingham, Ala.; Natchez and Vicksburg, Miss.; Vidalia, La.; Memphis, Dyersburg and Tiptonville, Tenn.; and Raleigh, N.C., to name a few.

All proceeds from the event will benefit the American Red Cross Disaster Relief efforts. Viewers are encouraged to pledge contributions online by clicking here or by texting REDCROSS to 90999 to make a $10 donation. The concert special will broadcast live from Nashville on Thursday, May 12 at 9:00PM ET and will also be available for streaming online at CMT.com.

Watch a Preview of CMT's Disaster Relief Concert