A vibrant illustration of two women singing together, one dressed like a rock legend from the 70s (denim vest, leather boots) and the other styled like a modern pop star (neon accessories, graphic tee). The background is a mix of retro concert posters and contemporary digital art, with abstract patterns and neon colors (hot pink, turquoise, and yellow). The atmosphere should evoke the feel of a live music festival, with swirling colors that mimic the rhythm of the performance.  --stylize 700 --ar 1:1