Miley Cyrus has a tattoo of a cat on the inside of her lip.

The 'Wrecking Ball' singer has unveiled the new design, which shows a yellow cat crying a single blue tear, and adding to her already huge collection of body ink.

Along with a picture on Instagram, she wrote: "Sad Kitty."

The tattoo can only be seen when Miley pulls down her bottom lip to reveal the cat, her latest in a string of designs covering her body.

As well as a portrait of her grandmother, the 23-year-old star also has a dream catcher, a quote by Theodore Roosevelt, a skull, the word 'Karma' and a mini replica of da Vinci's anatomical heart drawing.

Miley recently caused controversy at a concert in Milwaukee, Wisconsin when she had to perform her track '23' wearing only her underwear.

She later explained on Twitter: "not a new outfit for 23 I didn't make my quick change and I couldn't not come out for the song so I just had to run out in my undies :(

"Never happened to me before. But I love my fans as much as they love me! I couldn't miss 23

"Show must go on :( (sic)"