Adele's weight loss was aided by celebrity pals Cameron Diaz and Lady Gaga

ok.co.uk:

Adele stunned the world last week by posting a snap to Instagram in honour of her birthday, in which she looked noticeably slimmer.The 32 year old songstress has in fact lost a whopping seven stone over the years, and her fitness journey has been somewhat of mystery to fans with the Hello singer being fairly tight-lipped about how she has done it, only revealing snippets here and there.

However, it has now been reported that she had the help of a fitness guru who also trained Lady Gaga, and she hired a chef that was recommended to her by Hollywood film star Cameron Diaz.

A friend of Adele told the Mirror exactly how she came in contact with the specialists. The first is Harley Pasternak who is an nutrition expert and celebrity trainer based.