Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: After giving birth to her first child Bobby last September, Kimberley Walsh opened up about her struggle to shift the last of her pregnancy weight. But after taking the time to settle into motherhood, the former Girls Aloud star has bounced back, showcasing her svelte new figure in her role as a celebrity weight loss ambassador. To mark her new role with SlimFast, the 33-year-old glows in a glamorous photoshoot, sporting a daring sheer panel bodycon crop top and skirt in one picture and a figure-hugging jumpsuit in another. After putting on three stone during pregnancy, Kimberley, who returns to London's West End in 1960's musical Sweet Charity, admits that she was keen to shift the post-baby weight.The 33-year-old is SlimFast's new celebrity weight loss ambassadorKimberley Walsh has lost the three stone she put on during pregnancyShe gave birth to her first child, Bobby, last September 
 Question:'At last, that last half a stone is gone thanks to _, and I feel like I've got my body and confidence back – as well as my wardrobe!'.

SlimFast