Paul McCartney and Nancy Shevell looked marvelous during their annual St. Bart’s beach trip, attracting comments from the internet, such as age being just a number. Paul McCartney and his wife, Nancy Shevell, were recently captured enjoying the sunshine on the idyllic beaches of St. Bart’s. Their recent outing showcased the couple indulging in the simple pleasures of a tropical getaway. At 81, McCartney looked effortlessly cool in a long-sleeved black shirt paired with sunset-print shorts, embodying the spirit of a man who has lived through the ages of music. His hair flowed freely as he strol…