Yesterday was *NSYNC Day ("It's Gonna Be May")... and the group reunited to receive their star on the Walk of Fame.
Ellen was part of that ceremony... and today, *NSYNC is a part of her show.
Imagine being in THAT audience! (Watch some of the younger members of the audience, almost in tears!)
BEST PART of the video? Seeing the guys' reactions to the outfits they used to wear. Priceless!