Oasis star Liam is showing signs of male pattern baldness, according to UK's leading hair loss expert
Crown Clinic's surgeon Asim Shahmalak said the singer was clearly receding around his temples.
You can see the noticeable hair loss in these new pictures of Liam:
Dr Shahmalak said: "Liam Gallagher is clearly losing his hair around his temples.
"He is showing obvious signs of male pattern baldness in these new pictures of him in court in New York on the Bank Holiday.
"His hair loss is sufficiently advanced to require a hair transplant.
"He would benefit from a Follicular Unit Extraction procedure similar to that which Gordon Ramsay has recent had.
"Hair follicles are harvested from the back or sides of the scalp where there is an abundance of hair and replanted in areas where the patient is balding.
"In Liam's case, a transplant could have a very positive effect. It would fill in the areas around the temple where he has noticeable bald spots.
"I suspect that Liam is currently shaving his head to cover up his baldness - a lot of men do this.
"With a hair transplant, the hair at the front of his scalp would be fully restored and Liam could go back to growing his hair long again and restoring his trademark floppy fringe.
"Liam shouldn't feel too bad about losing his hair - around 40% of men aged 40 are suffering from male pattern baldness."
Several celebrities have recently undergone hair transplant - and made no secret of the fact.
Robbie Williams and Wayne Rooney have both gone public after having the procedures.
Bookings at the Crown Clinic have shot up by 25% in the last two years as thousands of men mimic their favourite stars by getting transplants.
Dr Shahmalak said: "Wayne Rooney had the biggest effect for us. What was striking about him was here was a man in his twenties having not one but two hair transplants and completely transforming his hairline. Lots of men thought, 'If it works for Wayne, it can work for me, too."
Dr Shahmalak regularly performs hair transplants on celebrities. His celebrity clients include TV doctor Christian Jessen from Embarrassing Bodies and model Calum Best, son of the late soccer legend Calum Best.
He said: "We worked with lots of people in the public eye. It's important they look good and stay young looking. That message won't be lost a star of the stature of Liam Gallagher. You don't see a lot of bald rock stars."