Jessica Simpson Steps Out After Hospitalization

The singer, 27, joined sister Ashlee, her boyfriend Pete Wentz and mom Tina for a lunch at El Torito in Encino, California.

"Jessica was walking very slowly with her hand on her back. You could see she was in a little bit of pain," an eyewitness told Usmagazine.com of Simpson, who wore sweats and Uggs. "She was dressed down and trying to stay low key."

During the lunch, "Jessica picked at a salad and didn't eat much — but she was in good spirits and was laughing very loudly with her sister," the witness added.

Simpson went home with her mom, who is staying with her while she recuperates, the source told Us.

Simpson was admitted to Cedars-Sinai Medical Center March 28. On Monday, her rep told Us she "has left the hospital and is doing fine."

Boyfriend Tony Romo, 27, did not join the group for lunch.

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