New tickets have been released for all four scheduled concerts by country superstar Garth Brooks, including two previously sold-out shows on Saturday.

The Saturday concerts sold out instantaneously when tickets were first made available in October, prompting concert organizers to add additional shows tonight and tomorrow.

Brooks, the highest-grossing solo musical artist in the U.S., changed the face of country music in the 1990s, and has continued to draw record-breaking crowds on tour. He will perform with his wife, Trisha Yearwood, in a salute to the commemoration of the attack on Pearl Harbor.

The concerts are scheduled for 8 p.m. tonight and tomorrow, and 6:30 and 10 p.m. Saturday. All net proceeds from the performances will benefit four historical organizations that advance the legacy of Pearl Harbor and the Pacific battlefield arenas of World War II: WWII Valor in the Pacific National Monument (USS Arizona Memorial); Pacific Aviation Museum Pearl Harbor; U.S.S. Bowfin Submarine Submarine Museum & Park; and Battleship Missouri Memorial.

Tickets, $69 for all seats, are on sale now at ticketmaster.com/garthbrooks or by phone at 800-745-3000.