Los Angeles: "The Voice" star Christina Grimmie's killer Kevin James Loibl reportedly embarked on a mission to change his appearance in an attempt to win the late singer's affection, before going on to kill her. Grimmie, 22, was killed on June 11 while meeting fans after performing at the Plaza Live venue in Orlando, Florida. She was shot three times by 27-year-old Loibl, before he turned the gun on himself after being tackled by her brother Marcus. Now his co-workers have new claims, revealing the extent of his infatuation with her. Loibl underwent "hair transplants and Lasik eye surgery" to change his appearance, and even became a vegan in an attempt to lose weight, reports tmz.com. He made no secret of his adoration for Grimmie, and reportedly played her music at work regularly. He reportedly went to one of her shows in March this year and hinted he met her there, and also told his co-workers he regularly "played online games with the singer".