I think that her English is better than her Mandarin, but she is fluent in Mandarin as well.
Once I watched her act a serious role in a Channel 8 Mandarin serial and she was excellent, which surprised me as I had always thought she was good in english comedies.
Other than being attractive, she is extremely versatile, fluent in both languages, funny in comedies, as well as a very good host and actress.
A rare talent in SG.