Sarah Palin blasted Late Show host David Letterman over his off-color joke about her daughter on Friday. Letterman said he was teasing her daughter Bristol, 18, not Willow, 14. "I would say that you and anybody else are extremely naive to believe that very convenient excuse of David Letterman's the other day," Palin said on the Today Show. "He took a couple of days for him to think of that excuse that, he wasn't talking about my daughter who was there with me at the [Yankees] game, the 14-year-old. Well, I think it's a weak excuse."(Photo: WENN)

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