Video of Madonna's 'Born This Way' tour mash-up emerges online
Gaga's track has previously been criticised for drawing a little too much inspiration from 'Express Yourself'.
Madonna opened her MDNA world tour last night (May 31) in Israel and performed the Gaga ditty as expected.
The tour is set to hit the UK in July with shows planned in London, Birmingham and Edinburgh.
Watch Madonna reference 'Born This Way' below:
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