Avalon, BarlowGirl, Jeremy Camp, Casting Crowns, Steven Curtis Chapman, David Crowder Band, Amy Grant, Natalie Grant, Jars of Clay, MercyMe, Newsboys, Chris Tomlin, Hillsong, Michael W. Smith, Rebecca St. James, Third Day, tobyMac, and a host of others. The industry is represented in Billboard Magazine's "Top Christian Albums" and "Hot Christian Songs" charts, and by Radio & Records magazine's Christian AC (Adult Contemporary), Christian CHR (Contemporary Hit Radio), Christian Rock, and Inspirational (INSPO) airplay charts, as well as the iTunes Store's "Christian & Gospel" genre. Not all popular music which lyrically identifies with Christianity is normally considered Contemporary Christian Music. For example, many punk, hardcore, and holy hip-hop groups deal explicitly with issues of faith but are not a part of the Nashville industry. Also, several mainstream artists such as Bob Dylan, The Byrds, Lifehouse, U2, and rapper DMX have dealt with Christian themes in their work but are not considered CCM artists.