ended her world tour on a sour note Sunday night when security concerns forced her to cut short her final show in Mexico City. In the middle of singing her fifth song oddly enough, "Stronger" Spears apologized, saying, "I'm sorry Mexico. I love you. Bye," Mexico City's Milenio
newspaper reports. Minutes later, fans allegedly began hurling Spears-related merchandise and chanting "fraud, fraud." Concert organizers who will offer patrons a full refund beginning Thursday said that an approaching thunderstorm was to blame. All this comes just days after the 20-year-old was caught flipping the bird to a crowd gathered at an airport in Toluca, about 40 miles from Mexico City. She later insisted that the gesture was meant for the intrusive paparazzi not her Mexican fans.