Pop star Lady Gaga has sparked controversy with her new single 'Born this way', with fans and critics saying the track is similar to Madonna's 1989 hit 'Express yourself', various media outlets reported.

Though the long-awaited song reached number one on the iTunes charts soon after its debut, it got mixed reviews from the critics amid accusations of a rip-off.

The 24-year-old singer uploaded the song on her Twitter.com yesterday and immediately faced a barrage of comments from her fans.

One follower wrote: Lady Gaga's song's good, but my God it sounds exactly like Madonna's Express Yourself. Another said: It doesn't just sound like Madonna's Express Yourself. You can literally sing the original over this one.

Celebrity blogger Perez Hilton, who is a huge fan of the 'Poker Face' hitmaker, also noticed the similarities between the two songs, tweeting: Express Yourself 2.0 is what people are saying? I'll happily take that!!!

DJ Riddler Houston's Hot 95.7 and Sirius/XM's BPM said The melody had similarities to Madonna's 'Vogue.' Then as I continued listening, the chorus sounded like 'Express Yourself.' 

Finally, the end with the choir chant reminded me of 'Like a Prayer'.

The new single Born this way was released on Friday morning and has reached the number one spot on iTunes in the US in less than three hours of hitting the stores. This is a record, doing better than Taylor Swift's Mine that topped the charts within five hours.