I acknowledge that Michael started to sing when he was 5, but don't know what was the first song he sang on stage with Jackson 5?

At age 5, MJ did not create any new songs yet. The first song recorded 의해 Michael was "My Girl" 의해 the temptations. Michael was known for his covering of 음악 when he was a child. He did not start to become world known until age 10 when he sang "The 사랑 당신 save, I want 당신 back, abc, ill be there, etc."