The Czech Republic-born babe was first spotted at the airport, heading over to her hotel to get ready for the evening’s festivities.
After getting all prettied up, Petra, 28, made her way to the Holt Renfrew shop, where she chummed it up with fellow attendees including Frank Anderson and Diane Von Furstenberg.
And it was all for a good cause, as Arts Umbrella is a non-profit center for arts education for young people - with a mission to “inspire kids for life through the arts.”








Brody Jenner
Spencer Pratt
Justin Bobby
Jason Wahler
Stephen Colletti