Fireworks light up the sky over the Swedish Music Hall of Fame during the inauguration of 'ABBA The Museum' at the Swedish Music Hall of Fame in Stockholm, Sweden, Monday May 6, 2013. A museum opens in Stockholm on Tuesday to show off band paraphernalia, including the helicopter featured on the cover of their "Arrival" album, a star-shaped guitar and dozens of glitzy costumes the Swedish band wore at the height of its 1970s fame. (AP Photo/Scanpix Sweden/Jonas Ekstromer)