Nicole Richie and Rachel Zoe Spread Holiday Cheer and More!

Nicole Richie welcomed fellow Hollywood moms Rachel Zoe, Julie Bowen and Soleil Moon Frye when she hosted Baby2Baby's Winter Wonderland charity event in Beverly Hills. "Check out @baby2baby and find out how you can give back!" Richie tweeted, asking her fans to take up the cause. Click through to see Amy Adams, Eva Longoria and more stars at this weekend's hottest parties!