Lady Gaga, Bruno Mars - Die With A Smile

It seems like you're referring to a song, possibly titled "Die With A Smile," by Lady Gaga and Bruno Mars. However, there isn't a record of a collaboration or a song by that title involving these artists as of now. It could be a fan concept, unreleased track, or a misinterpretation.

If you’d like, I can help you with information on their existing collaborations, discographies, or even fan-made projects. Let me know!