Nicole leaving Selena Gomez's concert

Nicole Richie, her sister Sofia and Joel Madden going out to Selena Gomez's first official concert at The Roxy in West Hollywood, CA on Saturday afternoon, September 26.
Nicole tweeted:
"Took my little sister to see @selenagomez 1st show; or she took me..."
The gorgeous new mom took the notion of dressing comfortably a step too far wearing an ensemble that looked suspiciously like a pair of silk pyjamas.
She added a white vest, sunglasses, her Balenciaga "City" bag and that fabulous pair of caged sandals.