I saw on Linkinpedia that the LPU12 version dates from January 7, 2000. It would be weird, in my opinion, if there wasn´t a version of "Rhinestone" with Chester, prior to January 7, 2000. I think there´s quite the possibility that the version we will get has Chester on vocals. We will also getting "Stick N Move" and Mike didn´t referenced that it has Mark´s vocals