Simplify the following text for a Grade 9 native English-speaking person.
Original: Patrick Vaughn Stump ( born Patrick Martin Stumph on April 27 , 1984 ) is a singer-songwriter , composer , record producer , and music critic .
Simplified: Patrick Stump ( born Patrick Vaughn Stumph on April 27th , , 1984 ) is an American musician formerly known as the frontman for rock band Fall Out Boy .