Slow and sad hip hop / rap song with pitched / chipmunked girl voice in the beginning and the chorus ?

In the beginning the high pitched / chipmunked girl voice says: "Oooh, oooh, ooooh". In the chorus it is the same girl's voice still pitched / chipmunked. The chorus beat goes like this: na, na-na, na-na-na-na, na-na-na-na, na-na. It is a slow and sad song, similar to Prince Igor by Warren G and Rapsody.