The one where Taylor Swift sings ‘Smelly Cat’ with ‘Friends’ alum Lisa Kudrow

It was the powerhouse duet that made us feel all the feels.

Taylor Swift ended her historic, celebrity-filled run at the Staples Center on Wednesday night with appearances by her bestie, Selena Gomez, and longtime “musical crush” Justin Timberlake. But when coffeehouse pop star Phoebe Buffay (a.k.a. actress Lisa Kudrow) took the stage during the 1989 World Tour to sing “Smelly Cat” alongside Swift, it had us saying: could this BE any more awesome?

Really.

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And, sure, we’re usually of the mindset that classics shouldn’t be tampered with, but this might be the exception. Hearing Kudrow school Swift — both with guitars — on how to sing the iconic earworm from “Friends” might’ve trumped the over-produced music video Phoebe is strong-armed into making in “The One Where Eddie Moves In” from Season 2.

“You’ll get it; you’ll get there,” Kudrow says to Swift, channeling her Phoebe persona.

Kudrow was the second “Friends” cast member to appear onstage this week during Swift’s set of shows in Los Angeles. Matt “Joey Tribbiani” LeBlanc was on the guest list of her Aug. 22 show — though, he didn’t sing.

That Swift would team up with Kudrow makes perfect sense. Swift has shown that her love for cats has intersected with TV before — she has two that she’s famously named after some of TV’s popular heroines, Olivia Benson (“Law & Order: SVU”) and Meredith Grey (“Grey’s Anatomy”).

I tweet about TV (and other things) here: @villarrealy

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