Madonna zings Lady Gaga sound-alike with song mix

Has Madonna insulted Lady Gaga by simply singing a Lady Gaga song? At a concert in Israel, Madonna cheekily switched between her old hit "Express Yourself" and Gaga's sound-alike song "Born This Way," and she can be heard chanting, "She's not me, she's not me" in a recent rehearsal. Staying largely mum on the notable similarities between the two songs after Gaga released "Born This Way" last year, Madonna in January commented that Gaga's song was likely "reductive" of her classic hit. "I recognized the chord changes. I thought it was ... interesting," the diva coolly remarked.