Steve Granitz / WireImage 1 / 2
Steve Granitz / WireImage 1 / 2

Phillip Phillips is officially on the mend.

Four days after undergoing surgery to address serious kidney problems, the Season 11 "American Idol" champ has been released from a California hospital. "I'm out of the hospital and back to work!" the Georgia-born crooner, 21, told E! News late Monday. "Looking forward to the future."

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Born with only one functioning kidney, Phillips largely hid his medical issues from the public during his time on the FOX reality hit. "He [was] in a lot of pain constantly," a source told Us Weekly after Phillips' win, "but he'd hate anyone to feel sorry for him, and never wanted to be popular because of it. He's amazing."

VIDEO: Idol's Jessica Sanchez tells Us about her bond with Phillip

TMZ reports that Phillips will recuperate at a Malibu, Calif., mansion owned by an exec on "Idol" before embarking on the show's summer concert tour, which kicks off July 6 in Detroit.

PHOTOS: Stars in concert

"If I can sing with all those kidney stones in me, I can make the first date," Phillips told TMZ.

This article originally appeared on Phillip Phillips Leaves Hospital After Kidney Surgery