Which American singer and guest star on Austin & Ally performed the song It's Goin' Down in the 2017 film Descendants 2?
It's Goin' Down (Descendants song): "It's Goin' Down" is a song from Disney Channel's 2017 television film "Descendants 2", whose music and lyrics were composed by Antonina Armato, Tim James, Tom Sturges and Adam Schmalholz. Sofia Carson: Sofía Daccarett Char, better known as Sofia Carson (born April 10, 1993), is an American singer and actress. Sofia Carson:  Her first appearance on television was as a guest star on the Disney Channel show, "Austin & Ally".
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