Simplify the following text for a Grade 4 native English-speaking person.
Original: Amanda Leigh `` Mandy '' Moore ( born April 10 , 1984 ) is an American singer-songwriter , actress and fashion designer .
Simplified: Amanda Leigh is an American pop singer and actress . She was born on April 10 , 1984 and she has been active since the late 1990s and the 2000s .