The couple teams up to walk the dog and pick up a coffee. Plus: Lindsay Lohan, Halle Berry, Nicole Richie and more

TEAM WORK

While Ashlee Simpson manages the Starbucks, boyfriend Pete Wentz handles their English bulldog Hemingway after visiting a pet clinic Sunday in Los Angeles. Despite the ever-present ring on Ashlee's finger, her rep recently told PEOPLE the couple isn't engaged.