Ariana Grande made a surprise appearance on the Late, Late Show … and shocked a new kids musical act in the process.

Prior to Ariana’s arriving on the set, the talk show’s host James Corden introduced the TNT Boys, a young boy band from the Philippines that James discovered on the talent show that he also hosts for CBS, World’s Best. While chatting with the young members of the band, James reveals that the boys’ favorite pop artist is Ariana Grande.

Soon after, the boys begin a performance of “I’m Telling You.” Of course, that’a when Ariana stepa out from behind a curtain and joins in.

Check out the fun in the video below. 

(Image source: Youtube)

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