▁Charlotte ' s ▁ 3 ▁Min ute ▁Bel ly ▁Bl itz . ▁The ▁work out ▁DVD ▁featured ▁Richard ▁Call endar ▁and ▁weight ▁loss ▁expert ▁David ▁S outer . ▁It ▁became ▁the ▁UK ' s ▁fast est ▁s elling ▁fit ness ▁DVD , ▁s elling ▁ 1 0 1 , 0 0 0 ▁copies ▁in ▁its ▁first ▁four ▁weeks ▁on ▁sale . ▁Within ▁a ▁month , ▁it ▁became ▁the ▁sixth ▁best - s elling ▁fit ness ▁DVD ▁of ▁the ▁de cade . ▁At ▁the ▁end ▁of ▁ 2 0 1 5 , ▁it ▁was ▁the ▁ 3 1 st ▁biggest ▁s elling ▁DVD ▁of ▁the ▁year . ▁Since ▁the ▁release ▁of ▁the ▁DVD , ▁it ▁has ▁contin ually ▁remained ▁at ▁the ▁top ▁ends ▁of ▁the ▁Sports ▁& ▁F it ness ▁DVD ▁charts . ▁ ▁In ▁ 2 0 1 5 , ▁C ros by ▁released ▁her ▁second ▁fit ness ▁DVD , ▁Charlotte ' s ▁ 3 ▁Min ute ▁B um ▁Bl itz . ▁The ▁object ▁of ▁the ▁DVD ▁is ▁to ▁get ▁a ▁' more ▁pe ach y ▁b um '. ▁It ▁uses ▁the ▁same ▁train ers ▁as ▁ 3 ▁Min ute ▁Bel ly ▁Bl itz . ▁ ▁In ▁April ▁ 2 0 1 6 , ▁C ros by ▁published ▁her ▁first ▁health ▁and ▁fit ness ▁book , ▁Live ▁Fast , ▁L ose ▁We ight : ▁F at ▁to ▁F it . ▁The ▁book ▁details ▁her ▁tips ▁and ▁tr icks ▁on ▁keeping ▁fit ▁and ▁ 8 0 ▁reci pes ▁for ▁a ▁health y ▁l ifest