Mila is becoming super popular at the moment - it also just makes me think of Mila Kunis immediately.
I don't think Sophia & Chloe are 'common', I think they're popular because they're especially beautiful, much more so than Mila in my opinion, which in any case is an abbreviation/nickname of various slavic names ie. Milena.
Annabelle is nice too, better than Annabella.