The song is so popular with the crowds they never let him sing alone as they join in every time he sings.
Song: Tal Vez
Artist: Ricky Martin
Composer: Franco de Vita
Album: Almas del Silencio
Released in 2003
An impressive album "Almas del Silencio" (his 5th Spanish language album) has been certified 2 times Platinum by the RIAA with worldwide sales exceeding 4 million records!
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As a cover version, I can point to Salsa De Hoy featuring Ricky Martin with a salsa version