What is the only U.S. state located east of the Mississippi River that is the site of more than one of the 60 U.S. National Parks?

Since 2010, only 3 solo artists, all of whom are singer-songwriters, have earned at least three of the so-called “Big Four” Grammy Awards, which are Best New Artist, Album of the Year, Record of the Year, and Song of the Year. Name 2 of 3 three artists.