The sparkly J Crew cardigan she wore Wednesday morning to meet British Premier Gordon Brown and his wife has already sold out.
The Obamas then met with Queen Elizabeth II and Prince Philip at Buckingham Palace. She wore a black skirt and sweater with pears. The first family gave the royal family iPods as gifts.
On Wednesday night, the first lady will have dinner with the premier's wife. Celebrity Chef Jamie Oliver is cooking- and Mrs. Obama is sitting next to Harry Potter author J.K. Rowling.