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John Mayer and Katy Perry perform at Barclays Center of Brooklyn on Tuesday in New York City.
John Mayer and Katy Perry spread their love the Brooklyn way on Tuesday.
Perry joined her beau on the last night of his “Paradise Valley” U.S. tour to sing their “Who You Love” duet on stage at New York’s Barclays Center.
“I’d like to welcome to the stage someone we all love, Miss Katy Perry,” Mayer said as the crowd roared for the “Roar” singer.
Perry greeted Mayer during the encore portion of his show with a kiss for their first-ever live performance together.
RELATED: JOHN MAYER, KATY PERRY DEBUT MUSIC VIDEO FOR ‘WHO YOU LOVE’ DUET
The two playfully danced and gazed at each other as they belted out the romantic ballad.
Earlier in the day, the couple debuted the music video for their lovey-dovey track on “Good Morning America.”
“Katy is a superstar for a reason,” he said on the morning show. “That’s the thing about working with somebody you love. You get to see them. I had to (make) a video in order to get to see my girlfriend,” he explained of the clip they both star in.
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John Mayer and Katy Perry performing ‘Who You Love’ at Barclays Center in Brooklyn.
“It’s a pretty big moving target to be a couple and have a song, but there’s an authenticity to it,” he said to GMA.
RELATED: JOHN MAYER, KATY PERRY REVEAL ‘WHO YOU LOVE’ COVER ART
Mayer opted to sing some of his old fan favorites on Tuesday including “Gravity,” Slow Dancing in a Burning Room,” “I Don’t Trust Myself (With Loving You)” and “Who Says.”
He even sang “Half of My Heart,” which was his popular 2009 duet with Taylor Swift.
No, Swift was not there.
The two musicians were rumored to have dated at the time of the song’s release, and the reported end of their fling allegedly left the now 24-year-old singer quite heartbroken.
RELATED: KATY PERRY, JOHN MAYER HAD ‘LONG COURTSHIP’ BEFORE MAKING RELATIONSHIP PUBLIC
True to form, she channeled her real-life heartbreak into music on the track “Dear John” from her 2010 “Speak Now” album.
Kevin Mazur/WireImage
John Mayer’s love Katy Perry joins him on stage Tuesday night to sing ‘Who You Love.’
“(‘Dear John’ is) cheap songwriting,” Mayer told Rolling Stone in June 2012.
“It’s abusing your talent to rub your hands together and go, ‘Wait til he gets a load of this!’ That’s bulls–t .. It really humiliated me at a time when I’d already been dressed down.”
Noticeably missing from Mayer’s concert set list was the his first single from his sixth studio album, “Paper Doll,” which was speculated to be a response to Swift’s “Dear John.”
PHOTOS: JOHN MAYER’S ROCKY RELATIONSHIP HISTORY
Swift recently opened up in an interview with New York Magazine about choosing to write lyrics about her past relationships.
“It’s a lot more mature way of looking at a love that was wonderful until it was terrible, and both people got hurt from it – but one of those people happened to be a songwriter.”
Swift noted that she doesn’t waste time penning songs about anything that is not “crazy love.”
“If I go on two dates with a guy and we don’t click, I’m not writing a song about that,” she added to the mag.
