Washington, Sept. 4 -- Pop icon Lady Gaga has announced the postponement of her scheduled performance in Miami, citing vocal strain as the reason for the last-minute change.

The announcement came via social media, where the singer expressed heartfelt regret over the decision, telling fans, "I hope you can forgive me.""I am really so so sorry, but I need to postpone tonight's show in Miami. During rehearsal last night and my vocal warmup tonight my voice was extremely strained and both my Dr and vocal coach have advised me not to go on because of the risk it poses," wrote Lady Gaga in a post on Instagram.

She also added that she wanted to push through but didn't want to risk permanent damage to her vocal cords.

"There is a significant ris...