Simpson-Wentz and her 3-month-old son arrive at London's Heathrow Airport. Plus: Christina & Max, Britney Spears, Justin & Jessica and more

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Ashlee Simpson-Wentz holds on tight to her little carry-on, 3-month-old son Bronx Mowgli, while arriving with dad Pete Wentz (not pictured) Wednesday at London's Heathrow Airport.