Has Madonna reignited Lady Gaga feud with Express Yourself/Born This Way mash-up?

It looks like Madonna might have made a dig at Lady Gaga by singing 'Born This Way'.

Madonna, Lady Gaga, feudMadonna and Lady Gaga feud could be back on. Copyright [WireImage]

Madonna is in Israel rehearsing for her MDNA tour and was captured on video singing her classic track 'Express Yourself' and then launching into Lady Gaga's 'Born This Way' mid-song.

She then brought 'Express Yourself' back in before switching to 'She's Not Me' from Hard Candy.

WATCH MADONNA'S MASH-UP OF EXPRESS YOURSELF AND BORN THIS WAY HERE

The song choice has got plenty of tongues wagging that Madonna is having a pop at Lady Gaga, since 'Born This Way' has often been compared to 'Express Yourself'.

Madonna herself has spoken about the similarities, telling The Daily Beast: "I thought, 'What a wonderful way to redo my song'. I mean, I recognised the chord changes. I thought it was... interesting."

Madonna, Lady GagaMadonna might be having a dig at Lady Gaga. Copyright [Wenn]

Her Madgesty also told Cynthia McFadden on 20/20: "When I heard it on the radio, I said 'that sounds very familiar.' It feels reductive."

Lady Gaga replied to the comparison talk by telling NME: "If you put the songs next to each other, side by side, the only similarities are the chord progression.

[Related artilce: Elton John keeps Madonna feud going with Super Bowl 'advice']

"It's the same one that's been in disco music for the last 50 years. Just because I'm the first f****** artist in 25 years to think of putting it on Top 40 radio, it doesn't mean I'm a plagiarist, it means I'm f****** smart. Sorry."

So whether Madonna was indeed having a dig or just paying homage to Lady Gaga, she's certainly got us all talking. Clever move, Madge.