"Si Tú Supieras" ("If You Knew") is a song written by Omar Alfanno and performed by Puerto Rican salsa singer Giro for his studio album Loco de Amor (1995).[1] It became his first number one song on the Tropical Airplay in the US. The track was recognized as one of the best-performing songs of the year at the 1996 ASCAP Latin Awards.[2]