ET's Rocsi Diaz put 'N Sync singer Lance Bass in the hot seat for a special Throwback Thursday challenge put together by ET and Buzzfeed.
ET's Rocsi Diaz put 'N Sync singer Lance Bass in the hot seat for a special Throwback Thursday challenge put together by ET and Buzzfeed.
Here's how the quiz worked: Rocsi showed Lance Bass old photos of celebrities and he had to guess who they were.
If you think that sounds simple, think again!
Check out the video to see how Lance did.