Sophie Kinsella is great... but what next?

Having recently moved to London, I have been stricken to the daily hustle and bustle of public transport, and my only escape is a good read. Having not been a avid reader before coming to London I started with the Shopaholic serise, as they were highly reccomended, and turned out to be a perfect combination of light hearted romance and comedy. Following this serise I decided to continue with Sophie Kinsella, I have recently enjoyed The Domestic Goddess (fantastic), and Twenties Girl.

Sophie Kinsella is a fantastic author, but could anyone reccomend another author that I may ventre into? I would love a light hearted romcom, and would be really adverse to getting in to anything too involved.

Suggestions please!!...