Katy Perry is on tour right now in Europe last night she played the Zenith in Paris, France.  In between hits like 'Firework' and 'Teenage Dream' she took a minute to sing the number one song in the world, 'Born This Way' by the Mother Monster herself, Lady Gaga. Watch Katy sing after the break.

How do you think Katy did?  Who else would you like to hear cover 'Born This Way'? Comment below.