Anderson CooperOn 'Anderson Cooper 360', producers pranked Anderson Cooper with highly embarrassing video of an appearance he made on 'To Tell the Truth' as a child.

While correspondent Isha Sesay read a story on Marg Helgenberger's recent swipe at Justin Bieber, producers surreptitiously inserted a still from the video that showed young Cooper in a furry, purple wig.

"Why was that picture up there? Wait a minute," said Cooper. "How did ...? Where did this picture suddenly materialize from?"