Ariana Grande reunites with Wicked co-star Cynthia Erivo for two duets during London concert

JAN MOIR: There's been a lot of talk about Ariana Grande's health recently. I attended her opening-night UK show and came away with a surprising conclusion…

Ariana Grande, Cynthia Erivo Reunite Onstage at London Concert

Ariana Grande appears to debut MATCHING tattoo with boyfriend Ricky Alvarez after hard launching their on-again romance