Madonna has slammed Lady GaGa in her ''leaked lyrics'' for 'Two Steps Behind Me'.

The veteran pop star has allegedly hit out at her younger rival after leaked lyrics from her new track 'Two Steps Behind Me' describes Lady Gaga as a ''copy cat''.

According to The Sun newspaper, Madonna sings: ''You're a copycat, Where is my royalty? You're a pretty girl, I'll give you that. But stealing my recipe, it's an ugly look.

''Did you study me hard enough? You're never gonna be, you're just a wannabe me. Like a sister all messed-up, who's gonna help you out? In your fantasy, you can try it all. But you can't be me.

''You can walk the walk, even talk the talk. But you'll always be two steps behind me.''

A source close to the 'Papa Don't Preach' singer told the newspaper that they believe Lady Gaga will be ''mortified'' when the song is released later this year.

They told The Sun: ''They're very harsh lyrics but Madonna really wants to express herself again. Gaga's going to be mortified.

''I'm hearing Madonna may well drop the first of the tracks as soon as November, much earlier than expected. I can't wait.''

The newspaper also report that Madonna hits out at her ex-husband Guy Ritchie -who is father to her 14-year-old Rocco and eight-year-old David - in the song 'Heartbreak City', which includes the lyrics: ''I curse the day we met. This memory is haunting me. I wish I could forget.''