First, I should mention that Vijayakanth isn't just an actor but also a singer. That's important to note because his versatility adds depth to his contributions. His songs are known for their emotional depth and social relevance. I should highlight some of his popular songs. Wait, what are some songs of his that are considered classics? I think "Nenjame Nenjame" from the movie "Singham" comes to mind. Also, maybe "Kadhal Thedekku" from another film. Need to verify the movies these songs belong to.