After a long, dark struggle with addiction, Backstreet Boy Nick Carter has emerged from the other side, strong and sober. Sadly, his sister, Leslie, wasn't so lucky: Her own demons overcame her and she died of a prescription drug overdose at the age of 25 last January. In his new memoir, Facing the Music and Living to Talk About It, Nick opens up for the first time about the pain of losing Leslie, and reveals why he didn't attend her funeral.