Cyndi Wang professed her love to Yao Yuan Hao at her concert on Jan 2.
She also shared with concert-goers how her life and career hit rock bottom when she decided to pursue her relationship with Yuan Hao three years ago.
According to Asianpopnews.com, she said: "Some said that I was very brave, and some said I was foolish. They have all asked me if I am able to repeat my life, am I willing to go through it again?
"I want to say that I was very tired at that time. If it is possible, I do not wish to repeat it. However, isn't love like this? If you have a chance to love someone, it's worth it!"
Although her heartfelt moment moved fans to tears, many blasted her and called her "shameless". They also accused her of being the "third party" that broke up Sonia Sui and Yuan Hao.
Cyndi's agency issued a statement on Facebook stressing that Cyndi had never intervened in others' relationships. Cyndi also personally responded online, "I was never the third party."
The agency also urged netizens to stop attacking her and said it would take legal action if they continued to defame her.