One woman's Facebook post is going viral after a funny mix-up at the bakery involving her birthday cake.

For her upcoming 25th birthday Georgia resident Kensli Taylor Davis wanted a cake with the Disney movie Moana as the theme.

So her mom called up the local bakery to place the order, but when they picked up the cake they got a hilarious surprise.

The baker had miss heard her mother and thought she said marijuana instead of Moana, so that's how they decorated the cake.

Instead of a cake with Disney's newest princess, she got one with a cannabis leaf and a My Little Pony smoking a joint and a pot leaf 'cutie mark'.

But she didn't let that ruin her birthday. The family instead laughed it off and ate the cake anyway. Kensli went so far as to call it "the best cake ever".