Frankie Grande is a Broadway veteran, but he's still leaning on his pop star sister, Ariana Grande, for support as he opens Titanique. "Ariana has been my vocal doctor," Frankie, 43, who is originating the role of Victor Garber in the campy musical, told Us Weekly exclusively on opening night at New York City's St. James Theatre on Sunday, April 12, which marked the famed ocean liner's first day at sea 114 years ago. "She texts me all the time.