Katy Perry Lets Loose While Partying in Paris (PHOTO)

By: Taryn Ryder / March 5, 2012

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Katy Perry's pre-split bikini vacay.
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Katy Perry is looking blue on the red carpet.
Being single has never looked so good!

Katy Perry was spotted out at the Grandlife Presents This is New York event at Le Regine in Paris over the weekend looking ever so chic. A partygoer at the event tells us:

Katy hung out with her crew she came in with, she was lovely with everyone she encountered and was like everyone else having a great time.

Perry and friends sipped on champagne as they danced the night away into the early hours of the morning.

Glad to see KP is letting loose! Meanwhile ex Russell Brand has been frequenting his yoga classes, with a few mystery brunettes.