John Mayer made his love for Katy Perry very public on Saturday, when he dedicated a song to her during the first stop of his "Born and Raised" tour in Wisconsin.

The singer took to the stage at Milwaukee’s Marcus Amphitheatre on July 6 to kick off his first headlining gig since he had surgery for a granuloma in his throat last August. The show, which was part of the annual Brew City music festival Summerfest, marked the start of his first tour in three years, minus two warm-up shows in April.

Mayer mentioned Perry when the topic of his surgery came up, saying she is "more incredible than I ever thought," according to E! News. He then discussed how she helped him as he tried to recover.

"She would order [food] for me... and she would tell people, 'it's nice to meet you, he says,'" he told the crowd, according to E!. "When I was in Montana ... with bad service ... She was so patient as to continue to get to know me and love me."

He dedicated the night's final song, "A Face To Call Home," to "Katy, who is my face to call home."

Milwaukee's Journal Sentinel Online reports Summerfest CEO Don Smiley said Perry watched Mayer's set from the mixing board.

The on-again, off-again couple, who ended things for the second time back in March, rekindled their romance early last month when they started hanging out again after Memorial Day. The musical duo most recently spent Fourth of July together at the Philly 4th of July Jam Concert, according to the New York Post. Perry shared a photo of her and Mayer, dressed in stars and stripes, with their arms wrapped around each other.

The guitarist will continue onto Cincinnati Tuesday where he will perform at the Riverbend Music Center.

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