According to Us Weekly, The X Factor judge made the accusations during an interview on VH1's Behind The Music - insisting that members Melody Thornton, Ashley Roberts, Kimberly Wyatt, Jessica Sutta and Carmit Bachar hardly sang a note.
Scherzinger is quoted as saying: "I love those girls, they're like my sisters, but people don't even know the story. They have no idea. I was in the centre because I was singing. I was the one singing.
"I never really talked about it, but I'll never forget I finished the album PCD and [producer] Ron [Fair] and I brought the girls into the studio and we played it for them, and it was the first time they'd ever heard the music."
The Wet singer added: "Do you understand what I'm saying? We played the album for the Pussycat Dolls. It was the first time they'd ever heard the songs."
Producer Ron Fair also went on to state: "Melody sang a bit here and there but the records were Nicole, with the exception of an occasional ad lib. They were Nicole. They were created with her."
Nicole also hit the headlines this week after admitting that she received death threats during her time as a judge on The X Factor USA, stating: "It kind of ruined me and I told them I didn't wanna leave my room. I didn't know that people could conjure up such thoughts – so hateful."