Craft a lively, girly poster of New Jersey with a retro vibe, densely populated with hand-drawn icons and landmarks of the state in pastel colors. Feature the Jersey Shore's boardwalks, the lush Garden State landscapes, and historic sites, each intricately stylized amidst a bustling backdrop of local flora and fauna. Integrate subtle heart-shaped silhouettes and the warm glow of carnival lights to weave a sense of sweet nostalgia. The composition should feel rich and vibrant, celebrating New Jersey's diverse charm in a crowded yet harmonious display.