One day in December 2004, Britney Spears doffed her shoes during a flight from L.A. to New York. The result? "The smell was unbelievable," another passenger later reported. "One woman had a word with the air hostess, then three or four others complained. She looked pretty embarrassed as she tapped Britney on the shoulder and asked her very politely to put her shoes back on. Britney went red, laughed and said her shoes make her feet stink. Thankfully she put them on."