Bristol caused a scandal during her mom Sarah Palin's 2008 vice presidential bid after revealing she was pregnant out of wedlock at age 18 by then-boyfriend Levi Johnston. Bristol gave birth to son Tripp in December 2008. She and Levi were briefly engaged but later broke up.
Bristol's single-mom status made headlines because her mom, Sarah Palin, had taken a very public stance for abstinence before marriage. Sarah Palin was ridiculed as a hypocrite when the press learned her daughter was not only having premarital sex, but had gotten pregnant.
In another ironic move, in 2009 Bristol was named an ambassador for a campaign to prevent teenage pregnancy by encouraging abstinence before marriage. Bristol Palin was paid $262,500 for her abstinence speaking tour. She earned an additional $70,000 in 2010.
“I’m not going to have sex until I’m married. I can guarantee it,” Bristol vowed in 2009.
Update: Bristol Palin: My second pregnancy was planned, not an accident
In a bizarre twist, Bristol now claims she had planned her second pregnancy after initially calling it a "disappointment." "This pregnancy was actually planned," Palin wrote on her blog June 28.
"Everyone knows I wanted more kids, to have a bigger family. I made a mistake, but it’s not the mistake all these giddy a$$holes have loved to assume. I do not regret this baby."