
The original kilabot ng Kolehiyala (College girl's heartthrob), Alejandro is best remembered for such songs as Kay Ganda ng Ating Musika, Panakip Butas, and Nakapgtataka.
Sison started his singing career after his triumph on a singing contest in Channel 7's noontime variety show " Student Canteen" in the late 70's and early 80's. Being one of the classic balladeers to have captured the true vocal essence of OPM in the 80's, Sison was responsible for the songs My Love Will See you Through (his biggest thus far), Si Aida si Lorna o si Fe, I'll Face You Tomorrow, Always Make Believe.