I am going with two popular songs to end the Mahendran-Raaja week.
Nitham Nitham Nellu Soru
Movie: Mullum Malarum (1978)
Actors: Rajinikanth,Shobha, Sarath Babu, Fatafat Jayalakshmi
Singers: Vani Jayaram
Lyricist: Panju Arunachalam
Mullum Malarum was featured in my 50 Tamil movies to watch before you die list. You can read more from the following link