Here is a list of bisexuals born in the 1980s. The people on this list have identified themselves as being bisexual and were born in the 80s. Feel free to use this list as the foundation for your own list of famous bisexuals.
http://www.ranker.com/list/famous-bisexual-people-born-in-the-1980_s/famous-gay-and-lesbian,
Adrianne Curry
Anna Paquin
Daniel Küblböck
Evan Rachel Wood
Jesse Jane
Justine Joli
Megan Fox
Missy Higgins
The Veronicas
Linda Bresonik