Ann and Nancy Wilson of Heart

(Photo by Jason Merritt/Getty Images for VH1)

MIRAMAR, CA - DECEMBER 03: Musicians Nancy Wilson and Ann Wilson of the band Heart pose in the press room during "VH1 Divas Salute the Troops" presented by the USO at the MCAS Miramar on December 3, 2010 in Miramar, California. "VH1 Divas Salute the Troops" concert event will be televised on Sunday, December 5 at 9:00 PM ET/PT on VH1.

Gregg and Duane Allman

Gregg Allman of the Allman Brothers band talks during a news conference Wednesday, Nov. 15, 2006 where it was announced that Madison Square Garden has acquired the Beacon Theater in New York City. The Allman Brothers have played a series of shows every March in the theater for the last 10 years. (AP Photo/Jeff Christensen)

Eddie and Alex Van Halen

NEW YORK, NY - MARCH 01: (EDITORIAL USE ONLY) Alex Van Halen and Eddie Van Halen of Van Halen perform at Madison Square Garden on March 1, 2012 in New York City. (Photo by Jamie McCarthy/Getty Images)

Malcolm and Angus Young of AC/DC

Guitarist Angus Young of the Australian rock band AC-DC, right, holds plaque as brother and bandmate Malcolm Young looks on after the Rock Walk handprint ceremony September 15, 2000 at the Guitar Center in Hollywood, Ca. (Photo /Newsmakers)

Ronnie and Donnie Van Zant of Lynyrd Skynyrd

Das undatierte Handout zeigt die Brueder Donnie, rechts, und Jonny van Zant. Mit 'Brother To Brother' haben die beiden Musiker, die frueher gemeinsam mit ihrem 1977 gestorbenen Bruder Ronnie die Band 'Lynyrd Skynyrd' bildeten, jetzt ein gemeinsames Album herausgegeben. (AP Photo/SPV-HO,Mark Weiss))