They're inseparable these days!

Katy Perry might have walked the red carpet at the Met Gala solo, but later in the evening she joined up with beau Orlando Bloom to cut loose at the Up and Down afterparty in the West Village.

The pop princess and the British actor have been going full steam ahead with their relationship since first hooking up at the Golden Globes back in January, and they show no signs of slowing. We wonder if they bumped into Orly's ex Miranda Kerr at any of the fashion bashes? She was in attendance last night too!

The pair retired to their hotel at the end of the evening, and for the Pirates of the Caribbean star's sake, we hope KP didn't follow through with her plan to wear a diaper under her monstrous gown! "I'm wearing a really large thing tomorrow, which will be very difficult to use the restroom in. I might just wear a diaper. I don't really care. I am just going to be looking around for people to help me to the restroom," she told reporters at a CoverGirl event the night before the Oscars of the East coast.

Somewhere, John Mayer is kicking himself for letting her get away!