The couple lends their star power to a charity event in L.A. Plus: Lady Gaga, Mark Salling, John Krasinski & Emily Blunt, Rihanna and more

  • LOVING CUPS photo | Joel Madden, Nicole Richie

Credit: Jeff Vespa/WireImage

Published: Wednesday Feb 10, 2010 | 05:00 PM EST

LOVING CUPS

They're the couple that keeps on giving! After celebrating the opening of their new Los Angeles playground on Tuesday, Nicole Richie and Joel Madden join 7-Eleven to kick off their new "Coffee Cup with a Cause" campaign. The promotion encourages customers to purchase a reusable coffee cup designed by a celeb, with proceeds benefiting that star's favorite charity.