Madonna disses Lady Gaga: 'She's Not Me' included in 'Born This Way' - 'Express Yourself' mash-up

It's no secret that there are parts of Lady Gaga's song "Born This Way" that sound quite similar to Madonna's 1989 single "Express Yourself." Madonna herself told Newsweek earlier this year, "I thought [when I heard 'Born This Way'], this is a wonderful way to redo my song ['Express Yourself']. I mean, I recognized the chord changes. I thought it was...interesting."

However, now Madonna has maybe fired another, more pointed shot at Gaga's hit. Over the weekend, while rehearsing in Tel Aviv, Israel for her upcoming tour, Madonna performed a mash-up of "Born This Way" and "Express Yourself" that launched into "She's Not Me," the sixth track from Madonna's 2008 album "Hard Candy."

Burn?

Something tells us Lady Gaga probably won't care that much.

So, what do we think, Pop2it readers? Is Madonna a past-her-prime artist trying to stir up trouble? Or is Lady Gaga a copycat who isn't up to snuff? Who's side are you on?