By Gail Mitchell LOS ANGELES (Billboard) - Following a suicide attempt, R&B singer Houston has gouged out his eye while on an overseas performance junket. A brief statement was released Wednesday by his Capitol Records label, saying only, "Our thoughts and prayers are with Houston during this tragic time." According to sources, the singer first attempted to jump out of a London hotel window last Thursday. Prevented from doing so by his security staff, Houston was locked in his room, at which time the injury occurred. No additional details as to his current condition or whereabouts have been disclosed....