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  • FORMAL AFFAIR photo | Olivia Wilde

Credit: Kevin Mazur/WireImage

Published: Friday Apr 18, 2014 | 07:00 PM EDT

FORMAL AFFAIR

With her baby boy due in just a few weeks, Olivia Wilde shows off her growing baby bump in another glam ensemble at Thursday's Revlon Concert for The Rainforest Fund – she's a spokesmodel for the brand – in New York City.