The couple were later seen resembling real-life Barbie and Ken dolls, with twinned groomed looks.
For her next change, Jennifer was seen in a baby rose-cream jumpsuit, with matching heels, that showed off her tiny waist and then flared into the trouser leg.
The pair had earlier been spied emerging from the Katie Couric studios in New York, after the former American Idol judge gave a pre-recorded interview for the ABC journalist's self-titled show.
Jennifer, waving like a royal, appeared to have had her hair re-primped before greeting her fans, with her teased curls bouncing around her shoulders like something from a Vidal Sasson advert.
She looked every inch the pop diva in a black pants teamed with giant buckled heels and a quirky T-shirt with the French slogan: 'Je suis fraiche parce que j'ai appris francais a l'ecole.'