"My voice is so hoarse," West said. "I can't finish the show...I can't let y'all have a show where I can't perform for you."
The crowd initially booed before chanting the rapper's name. "I'm very sorry. I love you," he said. "I'll give everyone a refund. I'll do better next time."
West had performed 45 minutes of his set when he decided the show was over.