I love Catherine Alliott (Rosie Meadow Regrets); Marian Keyes (a classic writer in this genre who also brings in black humour); Elizabeth Buchan (less chick lit, more serious relationship stuff, but really good and still light enough to cope with if you're baby-brained, like myself!).
I have to confess that I used to be a science fantasy geek...yes I loved the Lord of the Rings, the Hobbit, Tad Williams, Robin Hobb and other officianados of the genre, but I got seduced into chick lit with Kathy Lette, Mad Cows (she was good at her best but is a bit up and down).
I then moved onto Jennifer Weiner (In her Shoes, Good in Bed and others). And now, I have to admit I'm into a crossover genre...werewolf/supernatural chick-lit . There's a woman called Kelley Armstrong who wrote Bitten, Stolen, Personal Demon and others and I think she's great. It's like a chick lit novel but your heroine is a werewolf...I can't belive I'm admitting to this.
I also found Diane Settlerfield's 13th Tale really readable this year. It's definitely not chick lit, but it's light, readable and quite intriguing. Almost Jane Eyre-ish in it's tone and pace. Most enjoyable.