The 22-year-old stepped into antique dealer Alice's on Portobello Road with her boyfriend Conor Kennedy, reported Sun Online.
"She wandered into Alice's and dropped 30,000 pounds, then went up the road and spent another 20,000 pounds. She was only in there for about five minutes.
"About half of what she bought was for her, the other for Conor. She bought a drawing of a shark, some old medicine bottles and a pinball machine for him," the source said.