Getting together all of her closest pals, Katy Perry hosted a Labor Day house party at her Hollywood home on Monday (September 2).

Looking colorful for the final days of summer, the "Roar" songstress sported a sunflower-embellished outfit while sipping on a beer and chatting with fellow party-goers.

In other news, Katy has been busy promoting her new tune on Twitter while interacting with her millions of followers.

Dishing news on another upcoming project, Perry wrote, "THE #ROAR MUSIC VIDEO IS COMING TO YOU IN JUNGLESCOPE SEPT 5TH!"