Paul McCartney and Nancy Shevell shopped for fancy face creams at the Four Seasons Spa in DC yesterday. “We’re going to be the best-smelling people in town,” McCartney giggled as he tested creams in gym shorts and a T-shirt. According to a spy, he walked away with a handful of products starting at $50. The ex-Beatle was a Kennedy Center Honors recipient on Sunday, shortly prior to tomorrow’s anniversary of John Lennon’s death. Oprah Win frey, Merle Haggard, Jerry Herman and Bill T. Jones were also honored at the cer emony.