For six degrees of separation, I thought you must separate by six people. It seems your examples only separate by 3. Also, for this game, you usually have to link the last person back to Nnadia.
For example:
Nnadia+ Steven Ma, In the Realm of Success+ Ada Choi, On and Off the Track+ Sonjia Kwok, Lok Sun+ Sherly Yang, Angels of Mission+ Adam Cheng, Blade Heart+ Maggie Cheung, New Shanghai Beach+ Nnadia, Cold blood Warm Heart
Nnadia's first album came out in 1985. She released three more albums before Song Bird. Though, the songs were mostly about school.Oh yes I did know she sang before acting but wasn't her singing only small things like on children's shows and stuff for like two years before she actually participated in Song Bird and got popular. Isn't it after Song Bird that she released her first albumn? At least that's what I heard.