"I think their lives were pulling them in different directions, and they kind of had different ideas of what their marriage should be," a source close to Lachey says of the couple (last year).
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Despite the still-raw breakup, his niece "is holding up fine," he adds. "She's going to be okay. I know it must be rough on her, but she's doing good." Surfacing three days after the Thanksgiving festivities, the newly single Simpson betrayed no hint of heartache. "She looked great," says an observer at South Beach Tan, a tanning salon in Studio City, Calif., where Simpson – minus her wedding band – and a female pal showed up on Nov. 27. "One of the employees asked her how her Thanksgiving was, and she said, It was beautiful.' She was almost chipper."





