It’s not easy being a teenage heartthrob. RadarOnline.com can reveal singers who have fallen victim to the boyband curse, including One Direction’s Liam Payne and Boyzone’s Richie Rock, who spent $260 a day to feed his heroine addiction. The talented young stars struggled to cope with their global success – and their lives were derailed with drugs, alcohol and violence. Liam PaynePayne, 30, died on October 16 after falling from his third-floor hotel room balcony in Buenos Aires, Argentina. A toxicology report revealed Payne had a deadly mix of illegal substances in his system at the time of hi…