Paris Hilton visited the offices of famed personal voice coach Seth Riggs in West Hollywood last week. Riggs has previously worked with Michael Jackson, Stevie Wonder and ... Milli Vanilli?

Riggs told TMZ that Paris is working with his daughter, Rachel, to help her develop a more complete sound. He said that Paris is surprisingly shy when she sings, but, Riggs says, "she's getting there."

For those of you too young to remember, Milli Vanilli (Rob Pilatus and Fab Morvan), won a Grammy award for Best New Artist in 1990, but had it taken back after it was revealed they didn't actually sing on the album. Riggs told TMZ that the pair "both could sing pretty damn well" and were "asked not to sing" on the album.

Riggs' website mentions that he has worked with a who's who of recording artists -- but fails to list Milli Vanilli. Good move, Seth. Good move.