The theme song for The Stew of Life is sung by Fala Chen. It's called The Perfect Match. This is Fala's first attempt at singing a theme for a TVB series.
I find the theme to be enjoyable and catchy. But is it great? Urm... No. However, it is a commendable first effort by Fala.
Note: I can't find the theme video, I'll embed it when I can find it.