Simplify the following text for a Grade 11 native English-speaking person.
Original: Throughout the 1990s , Pavarotti appeared in many well-attended outdoor concerts , including his televised concert in London 's Hyde Park , which drew a record attendance of 150,000 .
Simplified: Throughout the 1990s , Pavarotti appeared in many big outdoor concerts , including his televised concert in London 's Hyde Park which drew a record audience of 150,000 .