In addition to work together on NBC's 'The Voice' as coach and coach's advisor, respectively, country singers Blake Shelton and Reba McEntire have raised $500,000 for victims of the tornadoes that ravaged Atoka County, Okla. The duo raised the funds via two incredibly successful and sold-out Tornado Relief Concerts held at the Choctaw Events Center in Durant on May 25 and 26.

Shelton and Reba are both native Okies and they co-headlined the event, entertaining their fellow statesmen (and women) for over two hours a night through the vehicles of song and comedic banter. The singers are accustomed to performing together, as they co-hosted this year's ACMs to great acclaim and Reba serves as the warm and motherly advisor to Shelton and his team members on 'The Voice.'

The pair opened with a duet of 'Oklahoma Swing,' which was of course fitting. Reba was born and raised just outside of Kiowa, which is only 30 miles away from the hardest-hit area, while the newly married Shelton resides in Tishomingo, also located not to far from the devastation.

Additionally, they performed Reba's 'The Night the Lights Went Out in Georgia,' 'Why Haven't I Heard From You,' 'Turn on the Radio' and 'Consider Me Gone.' The duo also sang Shelton's 'All About Tonight,' 'Goodbye Time,' 'Hillbilly Bone' and 'Some Beach.' Each of their current singles -- Reba's 'When Love Gets a Hold of You' and Shelton's 'Honey Bee' -- made it into the set list, as well. The encore consisted of each star performing a la carte, with Shelton doing 'Ol' Red' and Reba belting out 'Fancy.' Even pop star Kelly Clarkson made a surprise guest appearance at the May 26 show.

Reba and Shelton initially planned for a single event, but it sold out in less than two hours so they added a second show. All proceeds from both shows, as well as generous donations from The Choctaw Nation and fans, will go towards Atoka County's ongoing relief efforts through the Tushka Disaster Relief Fund.

But the concert revenue is not the be-all, end-all of fundraising options to help those affected by this disaster. A special mobile fundraising campaign has been set up with The mGive Foundation. Fans can text "OKGIVE" to 27722 to make a one-time $10 donation, which will be added to their monthly cell phone bill. Checks can also be made out to the Tushka Disaster Relief Fund and mailed to: 101 SE 1st Street, Tushka, OK 74525.

Watch a Behind-the-Scenes Shoot of Reba and Shelton Preparing for the ACMs