Actress blogs that Sarah Palin should focus on campaign, not daughter's pregnancy.While speaking to the delegates of the Republican National Convention on Monday, vice-presidential nominee Sarah Palin announced that her 17-year-old-daughter, Bristol, is five months pregnant. The chatter sparked by the news included a few words from someone who knows what it's like to be a teenage girl in the public eye: Lindsay Lohan took to her MySpace blog to weigh in on the issue. "Well, I think the real problem comes from the fact that we are taking the focus off of getting to know Sarah Palin and her...