The new mama, along with new bundle of joy Max Liron Bratman, has returned to her Beverly Hills abode after four days at Cedars-Sinai Medical Center, the singer's rep confirmed.

The petite 27-year-old wasâ€"and still isâ€""really sore" as a result of her scheduled C-section last Saturday.

"It was more painful than she thought," the source said, adding that the Grammy winner's pipes remained unharmed, and she was "already singing to Max."

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