Katy Perry has never been one to hide her emotions – and yesterday in Los Angeles was no exception.

The recently engaged singer was spotted wearing a T-shirt with the slogan “Girls Just Wanna Have Fun!” as she made her way to the gym.

Clearly a homage to Cyndi Lauper's famous 1980s hit, Katy teamed the design with a pair of 3/4-length leggings.

Katy Perry shows off her latest slogan T-shirt as she heads to the gym.

The I Kissed A Girl star later looked refreshed as she grabbed some food from a restaurant in West Hollywood.

Katy has been hitting the gym regularly over recent weeks following her engagement to British comedian Russell Brand.