Ke$ha has posted online a photo of her latest tattoo - which is located inside her mouth.

The singer uploaded the photo onto Twitter today (June 27) with the simple caption: "New tatt!!!"

The tattoo sees the words "Suck it!" inked on the inside of her bottom lip.

The daring move received a varied response, with one user tweeting in disbelief:

"No you didn't.... 0_0."

Another user meanwhile decided to look at the brighter side of life, responding: "Your upper lip has freckles. CUTEEE."

As previously reported, Ke$ha recently revealed that she has teamed up with veteran rocker Iggy Pop for some new recording sessions.