"never been more exhausted in my life. 3 flights in 2 days. reunited w (with) frankie / cried my eyes out. met the whole cast & had the best time". Pop star Ariana Grande reunited with her brother and his Big Brother castmates on Wednesday (24Sep14) when the 16th season of the U.S. reality Tv show came to an end. The pop star's sibling, Frankie, was one of the contestants.