There's a series of books called "The Sleepover Club" by Rose Impey. I haven't read them, but they seem to be popular in our libraries.
Louise Rennison's series "The Confessions of Georgia Nicholson" and Echo Freer's "Magenta Orange" stories are very funny diaries of teenage girls, discussing most teen issues and getting into more than few scrapes. There's a bit of snogging and some 'oh my god' talk about possible sex, but it's not gratuitous and should be OK for a mature pre-teen.
For something a little more serious in the way of subject matter, Anne Fine is OK. I find her books a little predictable and anti-climactic, but your daughter may like them if she enjoys the like of Jacqueline Wilson. Also, Hilary McKay's stories about the artistic Casson family - "Saffy's Angel", "Indigo's Star", "Permanent Rose" and "Caddy Ever After" are a gentle, warm but lighthearted set of stories that deal with family issues. Charming, I think, is the word for these.
I'll also cite a favourite book from my own childhood - Vivien ******'s "The Haunting of Cassie Palmer". It's a ghost story and still one of the best of the genre that I've read. I read it again a few weeks ago, and it's lost nothing for time.