Popsugar Celebrity Red Carpet Celebrities at Pre-Grammy Awards Parties 2015 | Pictures Stars Party Through Grammys Weekend at Over-the-Top Celebrations February 9, 2015 by Nick Maslow View On One Page Photo 62 of 62 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 62 Nick Jonas wore a leather jacket to the 2015 Billboard Power 100 Celebration. Previous Next Start Slideshow Lady GagaDemi LovatoNick JonasKim KardashianRihannaBeyoncé KnowlesEd SheeranKat DenningsPharrell WilliamsRed Carpet