Demi Lovato has responded to the tattoo artist who called out the singer for being a "drunk ass" while she was getting a tattoo. The artist was mad for not getting the recognition for the ink on Demi's forearm -- intended to look like a kiss.

Lovato, 22, recently got the tattoo covered up with another because she thought the lips tat looked more like a vagina than a smooch.

But Ashley McMullen was not happy about that, writing on Instagram, "Cool post @ddlovato, thanks for getting the tattoo covered up I did for free that you specifically asked for. Not to mention you didn’t even have the courtesy to offer me any money in the first place. You pissed all over our toilet seat and you made a fool of yourself. What a shame that people look up to you. The tattoo you covered it with kinda sucks too. Looks like you might forever be a goon. #demilovato #scumbag #turd #claimstobesober #drankallthebeer #peepeetoiletseat #yousuck It’s a really nice example to people your setting saying to not do drugs, but honestly you were acting like a full time slob…You never even gave me a shout out when I dealt with your drunk ass."

Demi, 22, has been very public about her struggles with drugs and alcohol and recently celebrated three years of being sober. Of course, Demi responded, apologized for being a drunk 18-year-old, but accused McMullen of tattooing a drunk teenager.

In a TwitLonger, Demi wrote:

"Dear Ashley McMullen, I wasn't going to acknowledge your bitter Instagram comments but since your side of the story has picked up some headlines, I would like to share my thoughts and send you a proper apology. First, I would like to say I'm really sorry I don't remember you or getting tattooed by you, but as you know I was f--ked up and sometimes people act like "#turds" when they're loaded. Second, I apologize for my "#peepeetoiletseat"... That wasn't on purpose, I was simply a drunken teenage girl. Lastly, I apologize for making fun of your work.. But... if I were you, I wouldn't claim that one because it looked more like an open vagina (or even a butt hole as my 8 year old little sister called it at the time.) I also wouldn't be admitting to the fact that you tattooed a very intoxicated 18 year old on a tour bus without the proper judgement that most legit tattoo artists have of saying "Hmm... This underage kid is wasted, maybe I shouldn't permanently ink a hot pink kiss mark on this girl's wrist....? Oh well... F--k it, she's famous." I can't blame you for getting the tattoo, I take full responsibility for that but if the issue here is you wanting credit, maybe next time you should wait for the person to get your tattoo sober so they would actually remember getting the tattoo in the first place, or perhaps you could've thought about all of this as a blessing that I forgot everything about you - that was until you outted yourself for the now internationally infamous "vagina tattoo." But you're right, I should give credit where credit is due, and you Ashley, surely deserve credit for this one. #justputitonmytab"

Well, hope this concludes that feud! Nevertheless, MTV News reached out the McMullen to see if she had a statement, but didn't hear back.