Katy Perry Covers Lady Gaga Live in Paris

Katy Perry treated a Paris crowd to a rendition of Lady Gaga's "Born This Way" Monday night. An acoustic version, no less. Pretty cool stuff.

Perry paid the Mother Monster the ultimate compliment during her show at Le Zenith concert hall, where she's in town for Fashion Week.

Katy's stripped-down homage was aided by just two acoustic guitars. Fans can only hope Gaga follows suit with a "Firework" cover ...