Happy Earth Day! Just a friendly reminder to get out there and help make this planet a better place to live.

You know, kinda like Nicole Richie, who was doing her part Wednesday night at the Dasani DIY PlantBottle party, where she joined designer Erica Domesek in creating fashionable green caps out of recycled sweatpants.

"I'm here for Earth Day," Nicole told E! News at Satine boutique in West Hollywood, where the event was held. "It's about doing the little everyday things."

So do what you can to be ecofriendly, folks. Whether it's before or after you pick up your copy of Avatar.

—Reporting by Chris Hall


See other stars looking to make a difference in our Do-Gooder gallery.

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