Charlie Sheen has officially gone all Britney Spears on us.
No, the actor hasn't shown his private parts to the world. Nor has he given birth to a pair of children with some skeezy back-up dancer.
He also isn't dating his agent, and has never lip-synched a concert.
But questions about Sheen's mental health have been raised because the Two and a Half Men star has shaven his head, copying Brit's infamous act from February 2007.
While the singer was crying out for attention, though, Sheen allegedly has a different motive:
"People think he's trying to avoid having his hair tested for drugs," a family friend tells told In Touch of the troubled star, who is in a rehab center and facing domestic violence charges after his December fight with wife Brooke Mueller.
Adds the source: "His behavior has been so erratic that his friends and family are concerned. He isn't keeping in contact with anyone that he used to right now."
Hmmm... sound familiar, Britney fans?
Of course, Sheen is accused of keeping contact with at least one individual these days. Reports have linked him with lingerie model Angelina Tracy, while other insiders say Brooke Mueller is preparing to divorce her husband.
Sheen's recent actions are so serious, they make Two and a Half Men look funny. We hope he gets help.