<Tr> <Th> Presented by </Th> <Td> <Ul> <Li> Regis Philbin </Li> <Li> Jerry Springer </Li> <Li> Nick Cannon </Li> <Li> Tyra Banks </Li> </Ul> </Td> </Tr> <Ul> <Li> Regis Philbin </Li> <Li> Jerry Springer </Li> <Li> Nick Cannon </Li> <Li> Tyra Banks </Li> </Ul> <Tr> <Th> Judges </Th> <Td> <Ul> <Li> Brandy Norwood </Li> <Li> Sharon Osbourne </Li> <Li> Howard Stern </Li> <Li> Howie Mandel </Li> <Li> Mel B </Li> <Li> Heidi Klum </Li> <Li> Simon Cowell </Li> </Ul> </Td> </Tr> <Ul> <Li> Brandy Norwood </Li> <Li> Sharon Osbourne </Li> <Li> Howard Stern </Li> <Li> Howie Mandel </Li> <Li> Mel B </Li> <Li> Heidi Klum </Li> <Li> Simon Cowell </Li> </Ul>

Who has been a judge on america's got talent