Nothing screams TGIF like a live cover of TLC’s 1994 hit “Waterfalls” sung by "The Voice" Season 12 coaches Alicia Keys, Adam Levine, Gwen Stefani and Blake Shelton.

Holy harmony.

In the video, all four had the chance to sing solo verses, starting with Stefani. (Anyone else notice the way Shelton looked at her?) Levine and Shelton played acoustic guitar and Keys was on Rhodes piano. The eclectic group of voices provided for one glorious chorus.

See more: Blake and Gwen's Cutest Photos

Hands down best part: Stefani and Keys taking turns spewing Lisa “Left Eye” Lopes’ rap verse.

"I love that," Levine said when the song wrapped. "That was it. Whatever that was, that was awesome. That's how you sing, America!"

See more: Jealousy, Bad Dancing and a Sneak Peek at 'The Voice' Premiere - What to Expect for Season 12

"The Voice" premieres Monday, Feb. 27.

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