Create a vibrant digital collage that embodies contrasting themes of sweetness and edginess. Incorporate a whimsical character with colorful hair and accessories, a playful neon sign with the word 'LOSER', a luscious cupcake adorned with sprinkles, stylishly decorated combat boots, a retro-inspired music space with vinyl records, and an edgy spiked accessory. Blend these elements to capture a youthful, dynamic aesthetic.