Christina Grimmie's killer Kevin Loibl was 'obsessed' with her and believed they would marry one day

It appears the man who killed Voice singer Christina Grimmie got hairplugs, had laser eye surgery and turned vegan convinced that the pair would marry.

Kevin Loibl tried to transform himself into a pretty boy in a delusional bid to win over the songbird, his Best Buy Geek Squad colleagues told TMZ.

The website reported that he underwent the hair transplant and laser eye surgery as well as drastically changing his diet to lose weight.

Loibl vowed to co-workers - who would tease him about his infatuation with the singer - that he'd someday marry Grimme, who rose to fame first on YouTube, and then in the sixth season of singing talent show, The Voice.

And he told them he went to one of her concerts in March, and hinted that he met her there.

He also claimed that he played online games with Grimmie, which a source told TMZ was untrue.

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The killer apparently became enraged when he was shown pictures of Grimmie with producer Stephen Rezza, possibly her boyfriend TMZ reported.

this guy ???? New music ¿? @stephenrezza

A photo posted by Christina Grimmie (@therealgrimmie) on

His obsession turned unspeakably violent last Friday when Loibl shot and killed the talented 22-year-old singer after a concert in Orlando.

He fatally shot himself after he was tackled by Grimmie's brother, Mark.

- news.com.au

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