If she lip syncs the entire video she'll be dragged. Especially because Carpool Karaoke have a lot of viewers. Instead of help, this will hurt the album campaign.
Everybody knows she's not a powerhouse vocalist but girl, you are literally in a car. All you have to do is shout the lyrics or just speak them. You don't even have to sing them. It's just for fun, not a life changing performance. This is ridiculous