By Breaking Celebrity News Staff

The uneasy truce between Madonna and Lady Gaga continues, as the Material Girl might have taken a very subtle dig at her heir apparent by blending pieces of Born This Way into her Express Yourself, the song many have said Gaga liberally lifted from in making her 2011 smash hit.

The mash-up was caught as Madonna prepares in Israel for her summer tour; noteworthy is that the rehearsal ends with footage and sound from Madonna's 2008 song She’s Not Me, in which Madonna sings about a young copycat that doesn't have her flare.