“I love William Turner: that’s why I took ‘Turner’ as my performer name,” Stella Belinda Franke tells me as we walk down a busy Berlin street, looking for an impromptu photo shoot location.   Her eyes glint with inspiration as she speaks the Romantic landscape painter’s name. It turns out the artist now known as Stella Turner loves to talk about art, and music. As we dodge cars, dog shit and stinging nettles, she manages to cram a lot into our brief conversation. Her aliveness is palpable.   Stella Turner also loves to play music. I first saw her belt out a couple of well-honed originals late one open mic night in Berlin. While clearly in her formative stages, she had something special to…