The `Bad Boys` singer begged her record company to find her a new property after being intimidated by a group of youths who shouted abuse and threw rocks, amid fears she would retaliate with violence.
She told Wonderland magazine: "I get all the kids on the street I`ve lived in throwing s**t at my car. "I have to move away because I`ll end up hitting one of them and getting arrested. That`s it. Career over.
"It`s the natural reaction when someone comes up to you and starts on you and gives you a slap first." Meanwhile, the 21-year-old star has helped save a British toddler`s life.
The singer stepped in after hearing about the plight of one-year-old Sophie Atay who needed £500,000 for life-saving cancer treatment in America and persuaded music mogul Simon Cowell - a judge on UK TV talent show `The X Factor`, which Alexandra won last year - to donate "tens of thousands" of pounds to the cause.
Alexandra said: "As soon as I heard about Sophie I was so touched I knew I had to help.
"I called Simon Cowell and he said, `Let`s do it.` He wanted to donate straight away. I am so happy that we have managed to help Sophie and I am sure she can pull through now."