10. Toby Keith - $55 million, (tie) - Ethan Miller/Getty Images
NORMAN, Okla. - In less than two hours, tickets to Toby Keith's Oklahoma Twister Relief Concert sold out Friday.
Tickets could be purchased for $25 starting at 10 a.m. for the Norman show. Performers include Garth Brooks, Willie Nelson, Sammy Hagar, Toby Keith and other big stars.
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The concert is sponsored by Walmart, Ford and Verizon.
Keith is a native of Moore, which was hit May 20 by an EF-5 tornado and 100 percent of the proceeds from the concert will go to the United Way of Central Oklahoma Relief Fund.
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Concert organizers said after the show's production is solidified more tickets may become available.
The concert is July 6 at the Oklahoma Memorial Stadium in Norman.
Doors open at 1:30 p.m. the day of the show. The concert begins at 3.
For more on the Oklahoma tornadoes visit