This aerial view shows a collapsed concert stage at Downsview Park in Toronto, Saturday, June 16, 2012. The top of a stage being set up for a concert by band Radiohead collapsed, killing one of the stage workers preparing for the event. (AP Photo/The Canadian Press, Toronto Star, Tara Walton)

People read a sign informing of the cancellation of a Radiohead concert after a stage collapsed at Downsview Park in Toronto on Saturday, June 16, 2012. Toronto paramedics say one person is dead and another is seriously hurt after the stage collapsed while setting up for a Radiohead concert. They say two other people were injured and are being assessed. (AP Photo/The Canadian Press, Nathan Denette)

Jennifer Nettles

US actor and singer Kevin Costner performs on stage with his band "Modern West" on October 20, 2009 during a concert in Bremen, northern Germany. Costner, who tours Germany for the first time, will also play in Mannheim and Munich. AFP PHOTO DDP / DAVID HECKER GERMANY OUT (Photo credit should read DAVID HECKER/AFP/Getty Images) R:\Merlin\Getty_Photos\DV_To_Getty_3140474_0.jpg

CHICAGO SOUL MUSIC PIONEER CURTIS MAYFIELD IS HONORED WITH THE RECORDING ACADEMY'S 1994-95 LIFETIME ACHIEVEMENT AWARDS WEDNESDAY MARCH 1, 1995, DURING THE 37TH ANNUAL GRAMMY AWARDS AT THE SHRINE AUDITORIUM IN LOS ANGELAS. MR. MAYFIELD DIED SUNDAY DEC. 26, 1999. HE WAS 57. AP PHOTO (1995)

Thom Yorke

COMMERCIAL IMAGE -- From left to right, Rick Nielsen, Bun E. Carlos, Robin Zander and Tom Petersson of the band Cheap Trick perform at the Cisco Ottawa Bluesfest on Sunday, July 17, 2011. The Ottawa Bluesfest is ranked as one of the most successful music events in North America. (Patrick Doyle/The Canadian Press Images PHOTO/Ottawa Bluesfest via AP Images)

Rick Nielsen, the lead guitarist for the rock band Cheap Trick, walks past the main stage at Ottawa Bluesfest after it collapsed in Ottawa, Ontario on Sunday July 17, 2011. The main stage at Ottawa Bluesfest collapsed during a severe thunderstorm that sent thousands of people running for cover. Bluesfest said there were no serious injuries. (AP Photo/The Canadian Press, Leon Switzer)