Gemma Collins has showcased her three stone weight loss as she posed in nothing but a tie-dye bikini.The 40 year old, who recently said she cut her hair into a short bob because of Holly Willoughby, took to her Instagram feed to post the stunning snap for her 2.2million followers to see.The former TOWIE star looked gorgeous in the two-piece swimsuit, which highlighted her slim figure and toned midriff.