Sandy Ricketts claims she stumbled over electrical wires that had been strung across a walkway at a concert venue and broke her shoulder, cut her lip and damaged teeth.

She has lodged legal papers at the Philadelphia County Court of Common Pleas and is demanding $50,000 (£31,250) in damages, according to EntLawDigest.com.

She has named Bieber and his mother, Pattie Mallette, among the defendants, although it is not clear why the singer's mum, who served as her son's manager early on in his career, is included in the lawsuit.

The star has yet to respond.

More: Justin Bieber | Justin Bieber's bodyguard threatened to kill ...

Daily Mail: Justin Bieber wins $9 million lawsuit against woman who claimed ...