The track "Do What U Want" (feat. R. Kelly ) was originally released in October 2013 as the second single from Lady Gaga 's fourth studio album, ARTPOP. 

Solo Version: Lady Gaga's solo performance of the track is available on the standard digital version of ARTPOP on Apple Music.

It sounds like you’re referring to the track “Do What U Want” featuring R. Kelly — originally by Lady Gaga from her Artpop album (2013). The .m4a extension typically indicates an audio file encoded with AAC (often used by iTunes/Apple Music).

It sounds like you’re looking for an interesting story tied to the track “Do What U Want” (feat. R. Kelly) — specifically in the .m4a format (likely referring to the file or audio quality).