I like her, but lately I've noticed that she's changed a lot and I'm kind of disappointed in some of the things... The weight loss, how she's been dressing, etc. Since she began dating Joel Madden and started trying to look more 'mature', she hasn't dressed as modestly as she used to, and I think things are only going to go downhill from here. Still, I think she's a way better role model for girls than the other celebrities like Lindsay Lohan, Paris Hilton, and Nicole Richie! They're just too trashy, in my opinion.
Anyway, as far as her acting and singing goes... It kind of depends, for me. I know that she isn't top-notch, but I still love some of her songs (I was obsessed with Beat of My Heart for so long!) and her movies have been fun to watch. I just finished The Perfect Man and it's my favorite by her so far!