Some stars fist bump, but Gwen Stefani and Rachel Zoe took it to another level with a belly bump. Stefani, who has remained mum on her pregnancy, joined her fashionable gal pal (who's expecting baby No. 2) in a "#majormommymoment" at an Oct. 23 gala in Beverly Hills. "Another fun one from moms night out at #wallisannenberg! Isn't @gwenstefani the most gorgeous?" Zoe shared on Instagram.