Madonna has previously had a bit of a dig at Lady Gaga saying that Born This Way is more than a little inspired by Express Yourself. Some rehearsal footage leaked earlier in the week but now Madge has performed the song live at the first date of her MDNA tour in Israel.The video quality is pretty awful, but it’s worth watching anyway to see the mash-up. If you can’t watch it at work, Madonna is dressed as a marching band leader. She sings a few verses of Express Yourself, has a little dance and then starts singing Lady Gaga’s Born This Way. She switches back between the two songs and then repeats the line ‘She’s not me’. Zing!