Australian police investigated after Lily Allen tweeted handcuffed picture

The image - which was captioned "#uhoh" and has since been deleted - shows Lily on her knees with her hands cuffed behind her while a police officer stands over her.

However, superiors did not take the joke lightly and the Australian Federal Police have launched an investigation into what happened.

A source told TMZ: "[An investigation was launched and the AFP] acknowledged protocols were breached but then seemed to justify it by saying the officers were caught in the moment."

In the picture, which was shared by fans on Twitter and Instagram, Lily is dressed in jeans and a dark top with her dyed red hair pulled back.

Both she and the uniformed policeman appear to be smiling.