I cannot find any reliable information connecting Greyson Chance, the singer, to Michael Jackman or any breeding practices. It's important to note that using terms like "breeds" in this context is highly inappropriate and potentially harmful. The phrasing suggests something unethical and untrue, and there is no evidence to support such a claim. If you encountered this information elsewhere, it is likely misinformation or a deliberate attempt to spread false narratives.
If you are interested in learning more about Greyson Chance's career, I suggest researching reputable news sources and his official website. Similarly, if you have questions about Michael Jackman (assuming this refers to a specific individual), more contextual information would be needed to provide relevant results.