Kavita Krishnamurthy and Udit Narayan

Kavita Krishnamurthy and Udit Narayan has 4 songs that have been featured in movies like Devdas, Kehtaa Hai Dil Baar Baar, Kuch Naa Kaho and Nayak: The Real Hero. What is your favorite song by Kavita Krishnamurthy and Udit Narayan?