getty (2) Olivia Culpo had specific rules for her and now ... with a half-up 'do. She then tied her hair back in a laid-back ponytail to go with her retro-feeling after-party minidress, which ...

Olivia Culpo and Christian McCaffrey pulled out all the stops to celebrate their impending arrival -- hosting an extravagant baby shower over the weekend ... which also appeared to serve ...