The birthday girl was all-smiles as she was surrounded by pink flowers, helium balloons and LOL-doll party accessories.
Guests munched on fairy bread, popcorn and cupcakes - fitting for the girly theme.
Last year, Bec also went all out for Billie's fourth birthday with a Paw Patrol themed celebration.
"Billie is obsessed with Paw Patrol and requested this as her party theme. I enlisted the help of @partywithlenzo to pull it all together and what a fab job they did," Bec wrote, alongside an impressive series of images.