Paul McCartney has just dropped the most heartwarming surprise of the season — a Christmas 2025 world tour inspired by a sweet plea from his grandchildren: “Grandpa, you’ve never sung for Santa Claus.” What started as a playful family moment has turned into what fans are calling “the most personal McCartney tour ever.” With Stella McCartney designing festive costumes and his grandchildren expected to join him onstage for the London finale, this tour promises to feel less like a concert and more like an unforgettable global Christmas gathering…