Which of the Three Tenors crossed over into popular music?
José Carreras:  Carreras is also known for his humanitarian work as the president of the José Carreras International Leukaemia Foundation ("La Fundació Internacional Josep Carreras per a la Lluita contra la Leucèmia"), which he established following his own recovery from the disease in 1988. Luciano Pavarotti: Luciano Pavarotti, (] ; 12 October 19356 September 2007) was an Italian operatic tenor who also crossed over into popular music, eventually becoming one of the most commercially successful tenors of all time.
Luciano Pavarotti