Ariana Grande fans got a huge surprise when Justin Bieber made an unannounced appearance during her show in Miami. (Courtesy: INFPhoto.com) alt : rtsp://r5—sn-p5qlsu76.c.youtube.com/CiILENy73wIaGQlqsPocFg0bNhMYDSANFEgGUgZ2aWRlb3MM/0/0/0/video.3gp
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Justin Bieber Surprise at Ariana Grande Concert! (Part 1)
