Original sentence: Contemporary singers of popular music, such as Freddie Mercury from Queen, a natural countertenor, and Justin Timberlake and the late Michael Jackson  who often sang in this range using falsetto, are generally not referred to as countertenors
Edited sentence: Contemporary singers of popular music, such as Freddie Mercury from Queen, a natural countertenor, and Justin Timberlake and Michael Jackson  who often sang in this range using falsetto, are generally not referred to as countertenors