There's no doubt that Madonna is having a really hard time in her life right now, but is she about to have a nervous breakdown? That's what her fans can't help but wonder as multiple reports indicate that the usually very professional and disciplined pop star has been two hours late for her last two Rebel Heart concerts and worse, that she might have been under the influence of alcohol as well.

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According to TMZ on Wednesday, fans are none too happy over the fact that Madonna might have even mocked concert goers during her tour stop in Louisville, Kentucky this past week.

One fan in attendance said, "Madonna was very drunk" while another said she was "a little drunk but funny."

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Another eyewitness was quite insulted by the pop star's "humor" and said, "Madonna was an awesome performer but man she was a b----! ... trashed talked Kentuckians and spoke in a fake hillbilly accent."

To make matters worse, many fans allegedly screamed obscenities at her during the show, despite her otherwise stellar performance.

Some critics though think that the mother-of-four is having a meltdown because of her personal life. Madonna has been dealing with an International Custody Battle with her ex-husband Guy Rithchie over their 15-year-old son, Rocco Ritchie. The teenager refused to board a plane from London to New York City to spend Christmas with his mother. Apparently, he has cut off his Madonna from his life and wants to live full-time with his father and his family in the British capital.

So far a rep for Madonna has not made any comments about her behavior at her Louisville concert. Stay tuned with Enstars for all the latest news on Madonna right here.

Tags: Madonna Guy Ritchie