Demi Rose was belly down, bottom up, and getting some luck today. The 25-year-old model and social media sensation's weekend Instagram stories showed those 15.3 million followers the secret to her killer apple bottom rear, with Demi shouting out upscale London-based clinic Shane Cooper as she revealed the B-Tonic machine treatment behind her sensational behind. Demi, who has jetted out to Kenya and likely posted a throwback, nonetheless offered one insane view as she let fans in to her non-invasive workout. Check it out below.