One of the world's most popular entertainers, Turner has been called the most successful female rock artist and was named ""one of the greatest singers of all time"" by Rolling Stone. Her combined album and single sales total approximately 180 million copies worldwide. She has sold more concert tickets than any other solo music performer in history. She is known for her energetic stage presence, powerful vocals, career longevity, and widespread appeal. In 2008, Turner left semi-retirement to embark on her Tina!: 50th Anniversary Tour. Turner's tour became one of the highest selling ticketed shows of 2008–2009. Turner was born a Baptist, but converted to Buddhism and credits the spiritual chants with giving her the strength that she needed to get through the rough times. Rolling Stone ranked her at 63 on their 100 greatest artists of all time and considers her the ""Queen of Rock and Roll"".