He reckons he looks five years younger thanks to the brilliance of Asim's work with the rest of the Crown Clinic team.
Calum isn't the only CBB contestant who could benefit from a hair transplant procedure.
Also going in with him is the former Strictly Come Dancing star James Jordan whose hair is receding markedly around the temples.
James is 38 and is in the perfect position to benefiit from either a FUE or a FUT (follicular unit transplantation) procedure.
Dr Shahmalak could fill in the gaps around his temples and restore his hairline so it would similar to when he first starred in Strictly way back in 2006.
James is married to one of Strictly's most famous female professional dancers, Ola Jordan.
James previously starred in Celebrity Big Brother in 2014 and, like Calum, is being invited back as one of the popular former contestants.
He would need around 1,250 graftgs (2,200 individual hairs) moved from the side or back of his scalp to fill in the balding areas arond his temples.
He could slow down or halt his natural hair loss by taking a medically proven hair loss product such as Propecia, also known as Finasteride.
Lots of celebrities have hair transplants to make them look younger and prolong their careers in showbusiness.
As well as Calum, at Crown Clinic we have also treated Martin Roberts of I'm A Celebrity and Homes Under The Hammer fame, Gogglebox's Chris Steed, football pundit Didi Hamann and the TV doctor Christian Jessen.
All our celebrity patients opted for the FUE method apart from Christian Jessen who wears his hair longer and opted for the more traditional FUT method.
FUE favours men who wear their hair short because the scarring is less evident than with FUT. If you wear your hair long, scarring is not such as issue, making the cheaper FUT method preferable for some.
Good luck to James Jordan in the Celebrity Big Brother house. And if you need any tips on how to improve your hair, James, just speak to your fellow housemate Calum.