American singer John Mellencamp is known for his catchy brand of heartland rock, which emphasizes traditional instrumentation. He has amassed 22 Top 40 hits in the U.S. and holds the record for the most tracks by a solo artist to hit number one on the Hot Mainstream Rock Tracks chart, with seven. Mellencamp has been nominated for 13 Grammy Awards, winning one, and has sold over 30 million albums in the US and over 60 million worldwide.