FLASHBACK: Watch 'N SYNC Transform Into Dolls for the Iconic 'It's Gonna Be Me' Video

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Believe it or not, you've been blessing your friends and family with your personal renditions of 'Bye Bye Bye' and 'It's Gonna Be Me' for 15 years.

It ain't no lie – 'N SYNC's second and most successful album, No Strings Attached, is turning 15! So dust off that old CD because we’re heading back to the year 2000, when ET was invited on set as the band transformed into real life dolls for the music video of their hit single, 'It's Gonna Be Me.'

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“We were in makeup for like four hours!” a 19-year-old Justin Timberlake told ET . “It’s worth it, though. It’s going to come off good on camera.”

With shiny faces and stiff heads of hair, the guys did their best to keep smiles on their faces.

“I think this gives new meaning to plastic surgery,” JC Chasez joked.

Check out this video to see the 'N SYNC dolls come to life!