Ke$ha

Kesha Rose Sebert (born March 1, 1987), better known by her first name Kesha ( k???/ KESH-?, stylized Ke$ha), is an American pop singer, rapper and songwriter. Her debut single, "Tik Tok", released in late 2009, reached number one in eleven countries and set the weekly records for digital downloads of a female artist[5] and total Top 40 Mainstream airplay in the US. The song also became the first Billboard Hot 100 number one of the decade and the longest running number one debut single by a female artist since 1977.