Ariana Grande's BF Ricky Alvarez Dances With Brother Frankie at Brooklyn Show

Ariana Grande's rekindled romance with Ricky Alvarez is getting a big thumbs-up from her brother Frankie ... or, in Ricky's case, a few pats on the head. Ricky joined Frankie in the crowd Sunday night at Barclays Center in Brooklyn for Ariana's…

By TMZ Staff