Kesha Rose Sebert (; born March 1, 1987; formerly stylized as Ke$ha) is an American singer, songwriter and rapper. In 2005, at age 18, Kesha was signed to producer Dr. Luke's label Kemosabe Records. Her breakthrough came in early 2009 after appearing on American rapper Flo Rida's number-one single "Right Round". Kesha's music and image propelled her to immediate success, with her debut album Animal premiering at the top of the charts in several countries. She achieved 3 more number-one singles, "Tik Tok" and "We R Who We R" as a solo artist, and "Timber" as a featured artist. At the same time, she continued to write songs for other artists, becoming respected as a songwriter. Warrior, her second studio album, was released in 2012, and spawned her eighth consecutive top-ten single "Die Young". "Tik Tok", at one point, was the best-selling digital single in history, selling over 14 million units internationally.