R.I.P. is a project started by the producers Brad Grobler and Rob Janssen.
The official story goes that R.I.P. started off as a way for Sean and Kim to let off some steam in the studio. Whenever Sean & Kim where in the studio, they always liked to imitate slow pop/R&B songs, and try and picture them as dance songs. Producer Brad recorded them just for fun, but the final versions were actually released afterwards.