Britney Spears caused a real stink when her smelly feet gassed a plane full of people. Passengers complained when the star shed her shoes on a flight. The smell was so bad that a stewardess asked Britney to put them back on reports The Sun. Britney, 23, caused a stir as she and hubby Kevin Federline, 26, flew from Los Angeles to New York. The singer blamed the whiff on her shoes. One passenger said: "The smell was unbelievable. One woman had a word with the air hostess, then three or four others complained. She looked pretty embarrassed as she...