For those wondering, the vocals in Karrion Kross' entrance were in fact sung by Scarlett Bordeaux.
Kross made his NXT in-ring debut on the May 6 episode of NXT, easily dispatching Leon Ruff. Kross' entrance featured vocals. Someone on Twitter asked Bordeaux if the lyrics were sung by her or if someone else sung them and she simply lip synced it. Bordeaux then said it was her voice in the vocals.
It’s my voice. -- https://t.co/olSfNIoO5j— Scarlett Bordeaux (@Lady_Scarlett13) May 7, 2020
Bordeaux first signed with WWE last year and reported to the WWE Performance Center last November as part of a class that included Shotzi Blackheart and Indi Hartwell. Bordeaux has yet to wrestle a match for WWE since signing with the company.
You can check out full results of NXT at this link and don't forget to check out the Wednesday Night Wars podcast where Fightful breaks down the action that took place on both NXT and AEW Dynamite at this link.