Create a bold and energetic emoji representing rock vocal performance, using a humanless collage. The design should feature a classic vintage microphone as the central element, surrounded by electric guitars, amplifiers, and musical notes that suggest the powerful sound of rock music. Add elements like a leather jacket, electric sparks, and soundwaves to evoke the raw energy and rebellious spirit of rock. Use strong, dynamic colors like black, red, silver, and electric blue to reflect the intensity of rock music. The background should be transparent.emoji