michelle kosinkski, nbc news, london. >> not sure how much cake she will actually be eating.e is lester. >>> she rose to prominence in the early days of "american idol" but since then, jennifer hod son's star has rocketed. now she is revealing truths that fanser in heard before. the bride-to-be's memoir, "i got this" hits the bookshelves on tuesday. i sat down with her for a "dateline" exclusive to talk about her life, her image and what it took to overcome family tragedy. ♪ >> reporter: in 2008, jennifer's first album came out, and what should have been a perfect time in the young singer's career, brought back the same weight issues that always haunted her. i was surprised to see you didn't see the album cover until you saw it in the store. >> yes. >> and there you are, but it's not exactly you. >> no. it's like where is the rest of me? >> reporter: what did they do? >> they photo shopped me to the size i am now, on that cover. we all know i was nowhere near that? . why would you photo shop me? it did not send a good message and didn't represent me well. did i not just prove