The term 'One of the Three Tenors' refers to a trio of famous opera singers, Luciano Pavarotti, Plácido Domingo, and Jose Carreras. The two solutions provided are DOMINGO (7 letters) and PAVAROTTI (9 letters). Plácido Domingo is a Spanish tenor who has performed in over 140 different operas and has won 14 Grammy Awards. Luciano Pavarotti was an Italian tenor who was known for his powerful voice and his performances of the most famous operas. He was also the first classical artist to have a number one hit on the UK pop charts.