Go ahead and call it a comeback, but Whitney Houston was the first to admit her voice wasn't 100% during her big performance on 'Good Morning America' on Tuesday.

The crackly-voiced singer, whose new album 'I Look to You' dropped this week, apologized to the 5,000-plus person crowd in New York City's Central Park for maybe pushing her still-better-than-99%-of-other-singers voice beyond its limits, and even tied her excuse to a familiar celebrity.