Katy Perry is nearly naked from behind going commando in pink low-rise, lace-up leather trousers that flash her butt crack ...

Wearing a pink halter cowl neck bodysuit with completely open sides, the top is also totally backless. Already pretty risqué, ...

Katy Perry's enjoying the local cuisine in Mexico ... enjoying a taco fiesta with a big group of friends, gulping down the delicious dish.