Jennifer Lopez uses a database to help her pick her outfits.

In order to avoid wearing the same pair of shoes, clothes or accessories more than once in a certain period of time, the 'On The Floor' hitmaker has her garments barcoded.

A source said: ''She had her feet up at a meeting, and someone noticed that she had a bar code on her shoe and asked her if she borrowed them.

''Jennifer laughed and said no, that she has her own internal bar code system on all of her closets to digitally keep track of what she wore and when she wore it, so that she isn't caught wearing the same thing twice.''

The database also has a picture of the clothes or shoes and has details about the size, colour and the date when she was last seen wearing it as well as its location to monitor which outfits are kept in her New York home and which ones are kept in her Los Angeles abode.

And to keep everything in control, the 46-year-old beauty hires someone to look after her wardrobe full-time.

The insider added to the New York Daily News' Confidenti@l column: ''She has a full-time staffer in charge of just her clothing. She takes her fashion very seriously.

''She never wants to be caught accidentally in the same thing twice. When she chooses to wear something more than once, it's intentional.''