Pop star Ariana Grande has lashed out at a fan for posting a homophobic remark about her gay half-brother on her Instagram.com page. Frankie Grande initially hid the fact he is related to the singer/actress by adopting his father's last name of Marchione when he signed on for the current season of U.S. reality show Big Brother, but he has since come clean about his connection to Grande. His tactics drew a number of negative comments from social media users, and one in particular caught the Problem hitmaker's eye after the fan referred to Frankie as "that homo" in the comments section of her Instagram profile page. Blasting the follower, the 21 year old reportedly wrote, "That 'homo' is the fiercest, most incredible, funniest, most intelligent, kind hearted and most LOVED person on the face of the planet! "he also cleaned up his game and told the truth to everybody in the house WHICH by the way, nobody else on the show has done. so i don't give a flying f**k if or when he comes home!!! he is incredible and i am SO proud!!!! oh and also 'that homo' gets more a** than you'll ever get in your life. k miss thing (sic)?"