Singer, mother and designer Victoria Beckham has enjoyed a varied career, but her clothing line is always held in the highest regard and people in the fashion world have opened up about why she's had so much success in that particular industry.

Paula Reed, fashion director at Harvey Nichols, explained to London's Evening Standard that the Spice Girls star has a strong work ethic and good understanding of how to preserve exclusivity, which in turn keep people interested and the items sought-after:

"People assume all celebrity designers are dilettantes, dabbling in fashion. But Victoria has stuck at it, delivering something of quality that many women really want to buy."

"We cannot keep her dresses in stock and they never go into a mark-down sale. We’d have more if we could but [the label] keeps production numbers down to preserve quality.”

Melanie Rickey, the editor and trend consultant behind the 'fashioneditoratlarge' blog added that Beckham was cautious to hire a very talented team so can learn on the job, but has a naturally great eye for tailoring and style:

"Victoria made sure she hired the best designers and learned from the best, as all the smartest people do. She acts as their muse or creative director, and has learned on the job. Can she cut a pattern? Probably not. But she can tell when the pattern needs to be tweaked (tighter probably)."

Watch Beckham talk to Ellen DeGeneres about fashion and swap shoes with her below: