While Bruno Mars is dreaming of being a a billionaire, Texas legend Bun B is a self-made trillionaire ... from the underground to the top.

The rapper drops the official music video for his latest single, "Trillionaire" featuring T-Pain.

The single is off Bun's recently released Trill OG, his third solo album that The Source recently crowned a hip-hop classic with their coveted five-mic rating.