Kesha Rose Sebert is an American pop singer and an active musician since 2005. Her debut single, « Tik Tok », was released in August 2009 to much commercial success. It reached number one in eleven countries and set the record for the most digital downloads in a week by a female artist and the total weekly Top 40 Mainstream airplay records in the US. The song also became the longest running number one debut single by a female artist since 1977.
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