Gwyneth Paltrow was admitted to New York's Mount Sinai Hospital yesterday afternoon. "She was slumped over in a wheelchair pushed by [husband] Chris Martin," an eyewitness said. "She looked not well." At 6:30 p.m., a bag — labeled "Gwyneth Martin" — from NYC organic home supply store Organics Avenue, and a white pillow, were delivered. A source says she and Martin were spending the night. The reason for the hospitalization is unknown. Her rep said, "We are not commenting as it's a personal matter."