what is their musical style?
Rock.
Evanescence
Evanescence is an American rock band founded in Little Rock, Arkansas, 
where did the band midland get their name UNANSWERABLE what is evanescence? An American Rock Band. who is their vocalist? Amy Lee.
wiki:19462302
Evanescence [SEP] Introduction
Evanescence is an American rock band founded in Little Rock, Arkansas, in 1995 by singer and pianist Amy Lee and guitarist Ben Moody. After recording independent albums, the band released their first full-length album, "Fallen", on Wind-up Records in 2003. "Fallen" sold more than 17 million copies worldwide and helped the band win two Grammy Awards out of six nominations. A year later, Evanescence released their first live album, "Anywhere but Home", which sold more than one million copies worldwide. In 2006, the band released their second studio album, "The Open Door", which sold more than five million copies. The lineup of the group changed several times over the course of the first two studio albums productions and promotions: David Hodges left in 2002, co-founder Moody left in 2003 (mid-tour), bassist Will Boyd in 2006, followed by guitarist John LeCompt and drummer Rocky Gray in 2007, and Terry Balsamo in 2015.