Nicole Richie and Camila Alves came out to celebrate Macy's Glamorama 30th anniversary event in LA last night. Nicole had husband Joel Madden by her side, while pregnant Camila showed off her bump solo on the red carpet. Robin Thicke was on hand to perform at the event, and Sharon Stone took the stage as well. Sharon chatted with us on the carpet about how AIDS prevention is a big cause for her, and Nicole talked about heading to NY Fashion Week on Monday. Camila, meanwhile, connected the evening's AIDS cause to husband Matthew McConaughey's latest role, for which he's lost almost 30 pounds.