How many movies have Anup Dev and Udit Narayan collaborated on?

They have worked on 9 movies together! Their first movie together was Hum Aapke Hain Koun..! (1994) while their highest rated movie together was Kuch Kuch Hota Hai (1998). They have not worked together since Krrish (2006). They are most known for their drama films together.