WrestleMania 21 was the twenty-first yearly WrestleMania professional wrestling pay-per-view event produced by World Wrestling Entertainment (WWE). It took place on April 3, 2005 at the Staples Center in Los Angeles, California. The official theme song for the event was ""Big Time"" by The Soundtrack of Our Lives. The secondary theme song was ""Behind Those Eyes"" by 3 Doors Down. The tagline for WrestleMania 21 was ""WrestleMania Goes Hollywood"."