Madonna admitted that she was once raped at knifepoint before she made it big.

In an essay for Harper's Bazaar, the "Material Girl" singer wrote about painful events in her past.

"New York wasn't everything I thought it would be. It did not welcome me with open arms," Madonna writes. "The first year I was held up at gunpoint. Raped on the roof of a building I was dragged up to with a knife in my back, and had my apartment broken into three times."

"I don't know why; I had nothing of value after they took my radio the first time."

Madonna also noted that when she was in her 20's, it was easier to keep up with being a pop star "because eccentric behavior is expected from you."

According to New York Daily News, another "low point" for her was after she adopted her son, David, in 2006.

The singer writes that "I didn't know that trying to adopt a child was going to land me in another sh--storm."

"I was accused of kidnapping, child trafficking, using my celebrity muscle to jump ahead in the line, bribing government officials, witchcraft, you name it. Certainly I had done something illegal!"

Though she admits she has had her low points in life, she still feels "blessed" to have four kids. She said she tries "to teach them to think outside of the box. To be daring."

image: Wikimedia Commons