Simone Giertz has shared sad news with her fans: her brain tumor is back. The 28-year-old announced the news on her YouTube channel. "When I had brain surgery in May, they removed large portions of the tumor," she said in the video. "Something I haven't talked about is there are still large parts of it left." She will have to undergo radiation for the next six weeks. InsideEdition.com's Leigh Scheps (http://twitter.com/LeighTVReporter) has more.