In the 1990s, Koh played the role of Miss La La on
The Ra Ra Show, marking her first collaboration with Andrew Lim. She also worked as a radio host for
Symphony 92.4FM, marking her third collaboration with Andrew Lim after
Under One Roof and
The Ra Ra Show. In June 2014, she performed with the theatre company Generasia in
Women of Asia, a live production at
LASALLE College of the Arts. Koh was also cast as Neena Goh in the American romantic comedy-drama film
Crazy Rich Asians, based on the
novel of the same name by
Kevin Kwan. She was the only cast member to speak in
Singlish in the film. == Personal life ==