I'm a bit overweight ,and a plus size. How can I get back to shape?
Are you sure you want to lose weight? There are plenty of plus-size models who are average to larger size and are beautiful!
The skinny types are the vogue .Need to context in miss world
Miss World is the oldest running international beauty pageant, created back in 1951. 
So what techniques do you suggest then?
The door-in-the-face (DITF) technique might work. It's a compliance technique. 
How is it done ,pls?
Door-in-the-face technique
The door-in-the-face (DITF) technique is a compliance method commonly studied in social psychology. The persuader attempts to convince the respondent to comply by making a large request that the respondent will most likely turn down, much like a metaphorical slamming of a door in the persuader's face. The respondent is then more likely to agree to a second, more reasonable request, than if that same request is made in isolation. The DITF technique can be contrasted
Chloe Marshall
Chloe Elizabeth Marshall (born 27 March 1991) is an English plus-size model from Cranleigh, Surrey. Having won the Miss Surrey title in March 2008, she became the first size 16 (U.S. size 12 to 14) model to reach the finals for the Miss England tiara.
Marshall has stated that she "wanted to go through to the Miss England finals to break the stereotype that you have to be tall and skinny to be considered beautiful." However, Marshall's Body Mass Index of