Tiffany and Debbie Gibson perform on 'GMA'

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Tiffany and Debbie Gibson perform on 'GMA'

Eighties teen pop divas Tiffany and Debbie Gibson performed on ABC's "Good Morning America" Friday, July 29, 2011.

Debbie Gibson and Tiffany perform together on ABC's "Good Morning America" Friday, July 29, 2011.

Hat? Check. Bra top? Check. Short-shorts? Check. Garter? Check. Feathers? Check, check, check, check!

Debbie Gibson shows off her 40-year-old body, nearly 25 years after she hit the music scene as a teen pop star with hits like "Only in My Dreams" and "Shake Your Love."

Debbie Gibson jumps with excitement as she performs on "Good Morning America."

Debbie Gibson had several non-age appropriate wardrobe changes.

Debbie Gibson and Tiffany rock the stage together.

Tiffany throws up a peace sign as she performs on "Good Morning America."

Tiffany is most well known for her 1987 No. 1 hit "I Think We're Alone Now." The singer was just 15 years old when the song hit the charts.

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Debbie Gibson and Tiffany perform together on ABC's "Good Morning America" Friday, July 29, 2011.

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