The American Christian rock band Skillet was originally formed in Memphis, Tennessee. The band comprises John Cooper, his wife Korey Cooper, Ben Kasica, and Jen Ledger. Skillet has released eight albums, with two of them receiving Grammy nominations for Collide and Comatose. Over the past 13 years, the band has spanned many different genres, including hard rock, industrial rock, and symphonic rock. As of 2010, they had successfully sold 1.6 million albums worldwide.