He threatened to kill her and rape or kill her sister.
He called her autistic brother the runt of the family and a disgrace. He said that she, too, was autistic because she was "stupid like him".
Even when the US singer went to work on a ship, thinking she would be safe from him, he found out where she was and threatened to confront her backstage or show up at its various ports of call.
Ms Leandra Ramm, 29, was terrorised by Singaporean Colin Mak, 38, for six years, during which he cyberstalked her and threatened to harm her and her loved ones.
Mak, who also harassed other women, was yesterday jailed three years on 14 counts of criminal intimidation.
Ten were against Ms Ramm, three against the boyfriend of a Hungarian music teacher, and another was against a Singaporean businesswoman.
He was also fined $5,000 for harassing a Ukrainian musician, trespassing and theft.
Speaking to The New Paper on Internet communication service Skype from San Francisco two weeks ago, Ms Ramm marvelled at how obsessed Mak was with her, given they had never actually met.
His obsession began after he watched a short feature on Ms Ramm on CNN.
She said that Mak sent her more than 5,000 e-mails, mostly death threats, between 2005 and 2011.
"It was so coincidental he saw that (CNN) clip. The moment he saw me, I was doomed," Ms Ramm said.
"He latched on like a bee latches on to a flower. I could tell he wouldn't stop the harassment. It didn't matter that he didn't meet me in person.
"It would have continued until he died or I died."