Simplify the following text for a Grade 7 native English-speaking person.
Original: On August 13 , 2006 , Crosby , Stills , Nash & Young performed to 16,000 fans at the new Center â '' 37 years after their historic performance at Woodstock .
Simplified: On August 13 2006 , Crosby Stills Nash & Young amazed 16,000 fans at the new Center -- exactly 37 years after they played at Woodstock .