Madonna Performs Mash Up of Lady Gaga’s ‘Born This Way’ & ‘Express Yourself’ (VIDEO)

Madonna fueled the feud with Lady Gaga this weekend after mashing up her hit song “Express Yourself” with the 26-year-old singer’s 2011 hit “Born This Way.”

Madonna, 53, was caught on camera during a recent rehearsal in Israel, as part of her MDNA tour, singing her 1989 track “Express Yourself,” only to segue into Gaga’s song “Born This Way.” She then goes into her 2008 song off her Hard Candy album titled “She’s Not For Me.” Interesting track listing.

This isn’t the first time Madonna has taken a dig at Gaga’s song. She told Newsweek this past January,

“I thought, this is a wonderful way to redo my song. I mean, I recognized the chord changes. I thought it was . . . interesting.”

However, Gaga doesn’t feel the same, telling NME of her song, “That’s retarded. If you put the songs next to each other, side by side, the only similarities is the chord progression.”

The “Born This Way” singer added, “I’m a songwriter. I’ve written loads of music. Why would I try to put out a song and think I’m getting one over on everybody? That’s retarded. What a completely ridiculous thing to even question me about.”

Whose side are you on: Madonna or Gaga’s? Sound off in the comments.