I love the detail in her paintings too...I love looking at those like the ones posted here...I love the expression on everyone's face. Like, you know who they are. That might sound stupid, but I like to draw and yet can't really get the right specific expression/individually unique facial characteristics for people in my own drawn faces.
Like, to me, Mama Cass looks JUST like Mama Cass...and I mean, yes, most people who attempt to draw actual real life people ARE able to do this, but at the same time, as others have said, I love the almost cartoon-like but at the same time realistic style, with all the bright, flat colours. Love it.