Katy Perry in Vivienne Westwood | “Katy Perry: Part Of Me” LA Premiere After Party at Bootsy Bellows

After a successful premiere of her concert movie “Katy Perry: Part Of Me” last night, Katy Perry joined her friends for the official after party, which was held at Bootsy Bellows lounge — a West Hollywood hot spot.

Katy was spotted getting off of her party bus wearing a black draped front corset cocktail dress by Vivienne Westwood that was printed with large navy blue polka dots.

Leave it up to the 27-year-old pop star to rock such a bold print with her purple and black hair. I love this look, but I wonder what’s going on with that beige bunched material at her bust.

I think it would have been cool if she had paired the dress with a neon shoe, but Katy kept it pretty tame with black pumps.

Katy celebrated at the party with her friends, which included her best friend Shannon Woodward, Robert Pattinson, Justin Bieber (pictured behind her in the pink jacket) and Selena Gomez.

Did you like this popping dot dress on Katy?