In fact, she and her stylist Andrew Mukamal had one marathon day last summer where they spent 10 hours trying on dozens of dresses before ... their collaborative book Barbie: The World Tour.

Ferrera wore a custom Dior Haute Couture black wool and silk crepe dress with white ... Performed Her Epic 'Barbie' Speech '30 to 50 Times' on Set To close out last summer's press tour in London ...