It sounds like you're referring to an iconic comedy scene involving his signature singing, likely the famous "Sing in the Rain" sequence from the movie Manadhai Thirudivittai .

: Frequently shares legendary clips like the "Sing in the Rain" sequence .

You can find dedicated compilations of his singing and comedy scenes on major platforms:

: A massive hit song from Kaalam Maari Pochu with over 135 million plays on YouTube Music .

In this scene, Vadivelu's character, , attempts to sing a soulful rendition of a song while it rains, leading to legendary facial expressions and hilarious vocal variations that have become staple meme material. Iconic Vadivelu Singing Moments

: A song from the movie Madras Matinee that captures his classic comedic style. Where to Watch

: Often cited as a favorite, featuring his unique "Im soooooooo-ing" vocalization alongside Prabhu Deva.