article-2165383-460_062712.jpg Further proof that Ke$ha takes pride in being a Hollywood bad girl!

The "Tik Tok" singer added to her growing tattoo collection on Tuesday, and showed off the fresh ink in a picture on her Instagram account. "New tatt!!!" she captioned the snapshot, which shows the phrase "Suck It!" etched on the inside of her lower lip. Ouch!

The 25-year-old pop star got her tat done at Alchemy Tattoo Parlour on Sunset Boulevard by artist Jules Gonzalez, a close pal of the glitter queen. This is the Nashville native's sixth piece of body art.

As if the gold tooth wasn't enough, the offensive language coming from scrolled on her pout says it all!