(CNN)More than a month after calling off her wedding, Bristol Palin revealed what she called "big news" in a blog post on Thursday: She's pregnant with her second child. http://www.cnn.com/2015/06/25/us/bristol-palin-pregnant/index.html?utm_source=feedburner&utm_medium=twitter&utm_campaign=Feed%3A+rss%2Fcnn_latest+%28RSS%3A+CNN+-+Most+Recent%29