Media has reported that pop star Nicki Minaj had to cancel upcoming concerts in England due to injured vocal cords. She apparently saw a doctor who diagnosed "strained vocal cords" after an x-ray and recommended voice rest for a few days. The singer apparently ignored this advice and sang in New York City on Aug 18 causing her voice to substantially worsen resulting in her decision to cancel her concerts this weekend. Details of her vocal cord condition are sparse. However, …