In case you missed it . Kayla Harrity with the goods the night of the Justin Bieber concert at The Boston Garden. When Hot Chelle Rae and Mike Posner hit the TD Garden to open for Justin Bieber at one of the hottest concerts of the summer, you know they’re going to stop at The Greatest Bar. Kiss 108 brought some of the world’s hottest pop stars to The Greatest Bar for an intimate meet and great with their biggest fans. Kayla Harrity takes you inside and makes the star studded introductions.