Ariana Grande lookalike, Paige Niemann ... The footage then transitions to reveal Paige on the other side of the door, now ...

Ariana Grande impersonator Paige Niemann has stunned ... The footage then cut to the other side of the door, showing Paige in a glamorous black gown and with her hair tied up in a ponytail ...

with Kelly and Mark host, 54, shared a glimpse into her makeup team working their magic to make her look like Ariana Grande’s character ... And then once I spoke, his face totally changed ...