Katy Perry in RUGBY Ralph Lauren & WILDFOX for an Independence Day Bike Ride!

Katy Perry spent the Fourth of July — and the eve before her “Part Of Me 3D” movie release — on a bike ride in Venice, California where she wore her best stars and stripes outfit.

Though the 27-year-old is known for her vibrant stage costumes, she didn’t opt for an in-your-face red, white and blue ensemble — but instead, stuck by pastel tones.

Katy wore a baby blue, light red and white “USA” reversible string bikini from the upcoming Resort 2013 collection by WILDFOX Swim, which she covered up with a lightweight RUGBY Ralph Lauren “Haeleigh” dress. The thin strapped, white jersey summer dress featured multiple navy blue stripes at the flounced hem.

With an embroidered ivory headband in her swept up hair, oversize sunglasses and comfy black ballet flats — Katy’s look was almost complete.

It obviously got a little chillier as the sun went down, because Katy layered on a matching “Starshine” baggy beach sweatshirt from WILDFOX Couture in Roadtrip.

The soft powder blue color surrounded bold white, all over star prints.

This was a similar design to the torn red “Seeing Stars Lennon” sweatshirt that many celebs selected for Independence Day!

What did you think of Katy’s holiday look?