Pearl Jam is a Grammy Award-winning American rock band formed in Seattle, Washington. They are considered one of the most influential bands of the 1990s. Founded in 1990, Pearl Jam was one of the "Big Four" bands of the grunge movement, alongside Nirvana, Alice in Chains and Soundgarden. As of December 2006, Pearl Jam has sold over 31 million records in the U.S. alone. Pearl Jam is one of the few currently active bands from the alternative rock breakthrough of the early 1990s. In a 2005 USA Today readers poll, Pearl Jam was voted the greatest American rock band of all time. In April 2006, Pearl Jam was awarded an Esky for best live act in Esquire's Esky Music Awards. The blurb called Pearl Jam "the rare superstars who still play as though each show could be their last."