The singer has 41 million fans on Facebook and is the most popular reggae star, living or dead, on social networks, according to Starcount.

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In the years before her career was cut short, the Mexican-American singer Lhasa de Sela sold a million records.

NPR: Singer, Songwriter Lhasa De Sela Dies

Nirvana, the band for which he was the talented and troubled lead singer, continues to sell 5 million or so albums a year.

FORBES: The Art of Grunge

Knapp was a star Christian pop singer from 1994 to 2002, selling a million records between 1998 and 2002 and performing in churches across the country.

FORBES: Doors Slammed Shut on Christian Singers Coming Out

Pianist, singer and songwriter Bruce Hornsby has sold more than 10 million records since releasing his multi-platinum debut, The Way It Is, in 1986.

NPR: Bruce Hornsby: From Jazz to Folk to Rock

The Jonathan Ross Show - which drew a peak audience of 4.6 million - saw the presenter interview Hollywood actress Sarah Jessica Parker, singer Adele and Formula 1's Lewis Hamilton.

BBC: Jonathan Ross pulls in 4.3m viewers to debut ITV1 show

Paula Fernandes, another Brazilian country singer whose latest album has sold over 1.5 million copies in Brazil, collaborated with Taylor Swift on a single to be released on January 3.

FORBES: Have You Heard Of Brazilian Country Music Phenomenon Michel Telo Yet? You Will.

To Be Loved is the follow-up to the Canadian singer's Christmas album, which has sold over 1.8 million copies in the UK since its release in October 2011.

BBC: Rudimental tops UK singles chart with Waiting All Night