Katy Perry Joins John Mayer Onstage for 'Who You Love'

12/18/2013 at 03:00 PM EST

Katy Perry Joins John Mayer Onstage for 'Who You Love'
John Mayer and Katy Perry
Kevin Mazur/WireImage

John Mayer

John Mayer

Katy Perry

Katy Perry

John Mayer and Katy Perry started and ended Tuesday with each other – and "Who You Love."

Following an early appearance on Good Morning America to premiere the music video for their duet, Perry appeared onstage during Mayer's encore in Brooklyn, N.Y., capping the winter leg of his tour with the first live performance of their song.

"Someone I know we all love – me a little more than you – please welcome the fantastic Ms. Katy Perry," Mayer, 36, said as the pop star made her way onto the stage to cheers from the crowd.

After an embrace following the song, Perry, 29, retreated backstage, only to reappear with Mayer and his band for their final bow.

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