(click to view in gallery)Victorious’ Ariana Grande stopped by the J-14 offices today, and we were psyched to talk about the hit Nickelodeon show, being back in New York (Ariana was in the Broadway play 13 with her Victorious costar Elizabeth Gillies back in 2008!), and who the real laser tag champ is (we’re talking to you, Avan!).And Ariana also played J-14 Karaoke! The lucky girl got to sing a Justin Bieber tune. Which song did she pick? You’ll have to check out the video to find out: