Beyonce is being sued by a backing singer for R87 million after it was claimed the star had plagiarised her music to write her hit song 'XO'. The 33-year-old star and her company Parkwood Entertainment and Columbia Records have been taken to court over her hit XO after Ahmad Lane filed a federal lawsuit claiming she had stolen the music for the track. Ahmad alleges that Beyonce's current backing singer Chrissy Collins gave her a copy of his song XOXO after he passed on the track to her when the pair were working together for another artist. However, the Grammy Award-winner has vehemently denied the claims in court documents obtained by Radar Online. The response reads: ''The two works at issue are entirely different songs that share no lyrical or musical similarity, other than perhaps the letters X and O. ''The two songs are distinct from a thematic perspective. ''[They have different] melodic content and there is no meaningful similarity in pitch series, rhythm or rhythmic patterns, melodic development or structure.'' The hitmaker also states that Lane hasn't filed a ''copyright registration'' for his track and asks for the R87 million payment to be dropped...