The Chainsmokers were all about the love ... fanboying over Amaya Espinal before bringing her up onstage for an electrifying performance that had the crowd buzzing!

TMZ’s got the clips -- Alex Pall and Drew Taggart were living for the summer dating show, hugging the S7 winner like she was their bestie before bringing her onstage at Brooklyn’s Under the K Bridge on Friday, calling her "the greatest woman that has ever existed." Olav Stubberud

Amaya was all about the love too, living her best life and working that crowd into a frenzy -- still riding that summer high!

As you know, Amaya took the "Love Island USA" crown this year with her partner Bryan Arenales , and since then, her life’s been on a major glow-up. Looks like she’s settling into the fame and loving every minute of

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