I always assumed she was trying to de-emphasize her plumpness. She's pretty, and has a great voice; but seems a tad self conscious about her weight. I always thought she was the best singer in the group.
Celtic Woman is my all-time favorite group, and Chloe is my favorite. It was sad that she left the group this year. In case you haven’t seen her lately, Chloe has lost quite a bit of weight. I suppose she is happier with her weight now, but I thought she looked better before.
She certainly has the voice of an Angel! :)