Jenni Rivera 1
Poor Jenni, wrapped in the Mexican flag, didn´t do justice to the Mexican National Anthem at the Bicentenario por la Independencia de Mexico at Dodgers Stadium in Los Angeles back in September of 2010. She was so timid during her performance that the audience could barely hear what she was singing!
Chino y Nacho 2
Rappers Jesús Alberto Miranda Pérez (L) and Miguel Ignacio Mendoza of Chino y Nacho onstage during the 11th annual Latin GRAMMY Awards. During the opening of the Venezuelan baseball season back in 2008, the Venezuelan duo forgot the words to their National Anthem and the crowd was understandably enraged.
Christina Aguilera 3
Xtina made an already bad year (she got divorced, she got arrested, her new boyfriend caused some controversy) worse by messing up the lyrics to the National Anthem at the mother of all sporting events, the 2011 Superbowl