Def Leppard, the British rock band with over 100 million records sold worldwide and legendary live stage shows, is joining forces with fellow platinum-selling rock icons Styx and Tesla for a summer tour that will stop at The Great Allentown Fair on its opening day, September 1.

Tickets to the 7 p.m. concert go on sale starting at 10 a.m. Saturday, February 7. Headliner Def Leppard's career began in the late 1970s and exploded in the new wave of British heavy metal movement during the 1980s. Hit singles such as "Photograph," "Rock of Ages," "Foolin'" and "Pour Some Sugar on Me" ran up the radio charts.

Yet it's Def Leppard's dynamic stage shows and groundbreaking albums including "Pyromania" and "Hysteria," two of the best-selling Diamond Award earners of all time, that have sustained the band's popularity through the decades.

Starting Saturday, February 7 at 10 a.m., tickets for the Def Leppard, Styx and Tesla concert will be available at the Fair Box Office, online at Ticketmaster.com, over the phone at 800-745-3000 and at Ticketmaster Centers.

They are $83 for reserved seats on the floor and $83 and $57 for reserved seats in the grandstand. Concert tickets purchased in advance include fair admission.

Tickets for 'reigning Queen of country music' go on sale December 13

Carrie Underwood, the six-time Grammy award winning country music vocal powerhouse, is the first headliner announced for the 2015 Great Allentown Fair.

Tickets to her Thursday, September 3 performance go on sale starting at 10 a.m. Saturday, December 13.

Underwood's celebrity keeps growing as she adds television acting and hosting to her established acclaim as a singer, songwriter, touring artist and multi music-industry award winner.

Recognized for her 2005 release "Some Hearts" as the fastest-selling country debut album in Nielsen SoundScan history and as Billboard's "Top Country Album" of the last decade, she followed with strong sales, hit singles and more awards for subsequent albums "Carnival Ridev released in 2007, 2009's "Play On" and 2012's "Blown Away."