Simplify the following text for a Grade 9 native English-speaking person.
Original: Kesha Rose Sebert ( born March 1 , 1987 ) , better known by the mononym Kesha ( , stylized Ke $ ha ) , is an American pop singer and songwriter .
Simplified: Kesha ( written as Ke $ ha ; real name : Kesha Rose Sebert ) ( born March 1 , 1987 in Los Angeles , California ) is an American singer-songwriter .