What is son by four?

Son by Four is a Latin American vocal group formed in 1996 in Puerto Rico. The group originally consisted of four members: Ángel López, Pedro Quiles, and brothers Javier Montes and Raúl Montes.

Son by Four gained international fame with their hit single "A Puro Dolor" in 2000, which topped the Billboard Hot Latin Tracks chart for 20 weeks. The song was later translated into English as "Purest of Pain" and became a crossover hit in the United States.

The group has released several albums over the years and continued to enjoy success in the Latin music industry. They are known for their harmonious vocals and romantic ballads.

In 2006, Son by Four announced that they would be taking a break from music to pursue individual projects. However, they have occasionally reunited for special performances and collaborations.