This looks like you're piecing together a lyric or a title. is a famous Bollywood film, and the phrase "Tu..." (meaning "You...") often appears in its songs.
The most famous romantic track from is "Tumse Milke Dil Ka" — but that doesn't start with "Tu." main hoon na - Tu...
However, the song that does start with and matches the "solid piece" vibe (meaning a strong, emotional, or powerful number) is: This looks like you're piecing together a lyric or a title