They added that the composers are now entitled to all backdated and future royalties, which could earn them up to £1million.
Songwriters including Denis Ingoldsby are now said to be credited alongside the original composers of the Peppa track.
Express.co.uk has contacted a representative for Louise, Denis Ingoldsby and Entertainment One for a comment.
Elsewhere, Louise reprised her music career following her split from ex-husband Jamie Redknapp back in 2017.
source: express.co.uk