The “Arch That Back Challenge” is the latest trend to go viral on Instagram and Snapchat and it has all the fellas drooling out their mouths. The new challenge, which consists of women arching their backs for the camera, is probably one of the most raunchiest and seductive challenges to pop up online and with the hashtag #ArchThatBackChallenge becoming widely popular on the different social media platforms, expect to see more voluptuous and sexy women arching their backs for the ‘Gram. Case in point, here’s 14 women that have already accepted the challenge and have created quite the buzz online.