Pop princess BRITNEY SPEARS is rolling in the new year with a new look — a $150,000 head-to-toe makeover!

Feeling blue about turning 31 on Dec. 2, the troubled performer is planning a full-body overhaul which will include a strict diet and exercise program along with extensive plastic surgery to her body and face, sources tell The ENQUIRER.

“She’s unhappy when she sees photos of herself with a very obvious triple chin, and she complains she has fat on her back and stomach,” says an insider.

“Britney says she needs to drop 30 pounds” and blames her weight struggles on the medications she takes to “help her cope” with the stress of her hectic career, the source added.

“Britney wants to do as much as she can to her body to improve her appearance. So right after New Year’s she’s going to go full-steam ahead to look wonderful again. She told me the cost of what she’s planning to have done will be $150,000,” the insider told The ENQUIRER.

Her plans include having excess eyelid skin removed and a possible brow-lift as well as Botox injections around her mouth, forehead and crow’s feet, lip-plumping injections, and a chemical peel, says the insider.

Britney, who weighs about 135 now, also plans to get back into a size 2 dress by undergoing LipoDissolve treatments on her butt, stomach and thighs at a Las Vegas clinic. Those run $1,500 a pop and, according to the insider, Britney will need at least 12.

“On top of all that, Britney says she is going to have to go back to a very intense workout regimen. She spent $250,000 to have a gym built and fully stocked with every exercise machine imaginable. She also installed a large sauna.”

Another issue Britney plans to address is the chronic psoriasis she has on her heels and other parts of her feet. Britney’s hoping the major makeover will boost her self-esteem and help her fix her relationship with fiance Jason Trawick. Sources say the couple had originally planned to wed before the end of the year but postponed the nuptials because they’ve been fighting.

Said the insider: “Britney’s confident that a makeover could patch up things between them.”