Sam Smith has shed more than a stone in two weeks.

The 22-year-old singer has taken to his Instagram account to pay tribute to nutritionist Amelia Freer after he managed to pile off more than 14lbs and ''completely transform'' his relationship with food by taking tips from her book 'Eat. Nourish. Glow'.

He wrote: ''Three weeks ago I met a woman who has completely changed my life. Amelia Freer has helped me lose over a stone in 2 weeks and has completely transformed my relationship with food. Everyone go check out her incredible book, and start to live healthy. It's not even about weight loss it's about feeling happy in yourself. Love you Amelia & thank you for making me feel so happy inside and out @ameliafreer #eatnourishglow (sic)''

The 'Stay With Me' hitmaker also admitted he has become ''obsessed'' with yoga after taking part in his first session just yesterday (17.03.15).

He tweeted: ''Just been introduced to Yoga for the first time in my life. F**k, Im obsessed (sic)''

But the star doesn't look likely to enjoy a session of his favourite new hobby today (18.03.15) as he is taking a much-needed rest after revealing his voice is not in tip-top condition.

He wrote: ''Day off today. Voice needs it. Still not feeling 100%. Water + sleep + water + sleep (sic)''