The "Sooner or Later" singer showed off his new face tattoo on Friday.
Showcasing his impressive 6-pack, Aaron posed shirtless and took a selfie revealing his new look.
"I'M THE BIGGEST THING IN MUSIC RIGHT NOW. I CANT BE DENIED. FACT CHECK ME," he wrote.
Aaron also gave fans a glimpse of what looks like Medusa on his face in another selfie.
You'll recall, Medusa was labeled a "monster" in Greek mythology and everyone who looked at her face turned to stone.
It's an interesting move for the 31-year-old considering fans are worried for the singer's mental state after he publicly accused his older brother of abuse and sexual assault.
The backstreet Boy later got a restraining order on Aaron claiming his brother hears "voices in his head."
Aaron also allegedly threatened to kill Nick's pregnant wife.
Nick claimed Aaron is mentaly ill and may cause harm on the family.
"My brother, Aaron Carter, has exhibited increasingly unstable behaviors and recently admitted to having schizophrenia with multiple other mental disorders. Most recently, Aaron informed my sister Angel that he thinks about killing babies and has thought about killing my wife, Lauren. Lauren is now pregnant, and I fear for our unborn child. Aaron is known to keep firearms readily available. I need an injunction because I fear for my safety, the safety of my wife and children, and the safety of m wife's parents. I am afraid he will listen to the voices in his head and cause harm to my family," Nick said.
Days later, their sister, Angel Carter, also asked a judge in Los Angeles County Court to protect her from Aaron.