An illustration of two women on stage, facing each other as if about to sing a duet. One is styled as a classic rock star with vintage elements (bandana, leather pants), and the other as a modern pop singer with bright colors (stylish outfit, vibrant hair). The background blends retro textures with neon concert lighting, using contrasting colors (deep blue and bright pink) to symbolize the mix of old and new. The art style should evoke classic rock posters with a contemporary twist, reminiscent of the work of Wes Wilson.  --stylize 800 --ar 1:1