First and for most, major shout out to Denver's own promoters for throwing this great event. 3 Deep Entertainment
Via: eonline.com :
After attending a Phish concert last night, the 19-year-old star hit the annual Cîroc White Party, being hosted by Kelly Rowland at Denver nightclub Beta—and within moments of being escorted to a private booth, Bieber and a buddy had shed their shirts.
A source exclusively tells E! News that a couple of SUVs ferrying Bieber and his entourage pulled up to Beta at around midnight and one staffer hopped out to inform club management that the singer and his small group wanted a private VIP area to hang out in, and were hoping to gain entry in as low-key manner as possible.