Oksana Grigorieva -- I'm Releasing New Music ... and It's Gonna Be Hip-Hop!

Move over, Nicki Minaj -- TMZ has learned Oksana Grigorieva is planning to release new music ... and the new tracks will be HIP-HOP/DANCE songs. Yes, really.

Grigorieva's rep, Steve Jaffe, tells TMZ that Oksana has already completed the first song, "Dark Secret," and she is currently in the process of shooting a music video.