A lively illustration of a classic vintage hot rod cruising down a sunlit avenue adorned with swaying palm trees. The nostalgic cityscape in the backdrop features vibrant buildings and a glowing neon sign, bustling with a diverse crowd. The words "Summer Vibes" appear in a retro, weathered font, each letter shining in a different hue, evoking a nostalgic feel. The scene is ideal for a t-shirt design, set against a clean white background.