"This kid is amazing!" These were the words of American superstar Mariah Carey upon being shown a video of Filipino music duo Aldrich Talonding and James Bucong covering one of her most enduring hits, "Hero."

Carey was the latest guest featured on Glamour Magazine's "You Sang My Song" YouTube series, where music artists are made to react to various fan renditions of their songs.

After seeing and commenting on YouTube covers of "Always Be My Baby," "We Belong Together," "Touch My Body," "Heartbreaker," and "My All," Carey last watched the Pinoy duo's version of "Hero," with Talonding singing and Bucong on guitar.

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Calling Talonding's vocals "amazing," Carey went on to reflect on the phenomenal success of "Hero," which she first released in 1993.

"It's interesting because when I first wrote 'Hero,' I wasn't even writing it for myself. There is something special about it, especially when you see such a wide range of people doing the song -- different ages, different places in the world. It's really a nice feeling as a songwriter," she said.

Addressing both Talonding and Bucong, she added: "I loved the rendition. Amazing."

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The video of the duo shown to Carey was originally uploaded in 2014 on YouTube.

At the time, Talonding was 15, and Bucong, 19. That was a year after their cover of "Dance with My Father" went viral with nearly 8 million views, leading to their appearance on the US talk show "Ellen" within just weeks.

The B'laan performers then made it to local TV shows, including "ASAP," where they reprised "Dance with My Father" alongside Kapamilya singer Angeline Quinto.

Watch more in iWantv or TFC.tv

Watch more in iWantv or TFC.tv

Today, Talonding and Bucong continue to regularly update their YouTube channel with covers of various songs, notably Christian tunes.

Carey's appearance on "You Sang My Song" follows the likes of Katy Perry, Demi Lovato, and Pink, who all similarly gave comments on fan renditions of their hits.

The celebrities' reactions are then usually shown to the artists behind the covers, often resulting in emotional moments.