WHCD 2013 Attendees: Pretty Sure I Just Spotted NSync's J.C. Chasez
CSPAN might have something here, showing coverage of the event without any commentary. The camera's just scanning the room as David Gregory talks to who I'm assuming is his wife, and a random tux-wearing man sneaks cigars in a zip lock bag into his pocket.
However, in the E! News-less world, I am pretty sure the camera showed J.C. Chasez, former member of boyband NSync, trying to move across the room and presumably find his table.
CSPAN has continued to reiterate that only media organizations can purchase tickets, but they can invite politicians, celebrities, and apparently former boyband members.