AceShowbiz -

Khloe Kardashian put her problems behind as she stepped out September 2 to celebrate Labor Day with her pals. The "Keeping Up with the Kardashians" star was flashing smiles as she arrived at a house party hosted by Katy Perry in Hollywood, CA.

Khloe who is rumored splitting from Lamar Odom due to his continued drug issues looked fab in daisy dukes and a black v-neck tee with a flannel shirt wrapped around her waist. Letting her two-toned hair down, she finished off her look with aviator glasses and Timberland boots.

Katy herself was seen rocking a cute sunflower-print outfit consisting of short shorts and short-sleeved top tied around the waist. Big hoop earrings and a black-and-white bandana completed her appearance. She was joined by rocker boyfriend John Mayer.

Other famous faces coming to the casual celebratory bash were the likes of Shannon Woodward, Ellen Page, "Fifty Shades of Grey" author E.L. James, Jesse Metcalfe and fiancee Cara Santana, and Julianne Hough.

While Khloe never officially commented on her split rumor with her husband and his alleged drug addiction, she has been writing cryptic messages on Twitter to express her feelings. "As much as I wish I were made of steel... I'm not," she wrote. "I'm pretty damn close to it though hehe."

In another occasion, she dropped an expletive rant, "Really hard to sit here and listen to people talk s**t about my family! F**k you and shame on you! I'm too protective for this s**t!"