The Sugababes singer has been thin throughout her life, with her slim physique often being criticised since she joined the band in 2005.
Amelle split from her long-term boyfriend last year and also spent time in a health clinic after suffering from nervous exhaustion. She admits the stress caused her to drop more weight, which is why she has been criticised for her apparent yo-yoing figure.
"I`d always been thin and conscious of it. The stress last year meant I lost even more weight. I felt like a little boy with no boobs," she explained to Company magazine. "Now I-ve put on nearly 28lbs, my boobs are back and I-ve got a bum. I went on the Pill for monthly pains and literally ate the house down - I-d eat two dinners!"
Amelle insists she has never had to diet, and didn`t realise what it felt like to have to count calories until she starting piling on the pounds last year.
"Heidi`s always on a diet and works out all the time - she almost has to, bless her heart. I`d never understood that before," Amelle explained. "When I ballooned, I was like, -Heidi mate, I-m so sorry about complaining about how skinny I was!` But everyone has lumps and bumps, I have cellulite. Who cares?"