Dave "Baby" Cortez, born David Cortez Clowney, is an American rhythm and blues organist and pianist known for his instrumental hits in the late 1950s and early 1960s. His style is characterized by a blend of pop, soul, and R&B, with his organ work serving as a distinctive element. Cortez gained prominence for his 1959 hit "The Happy Organ", which was the first instrumental No. 1 single on Billboard's Hot 100 chart. His impact on the popularization of the organ in R&B and pop music is significant, marking him as an influential figure in music history.