The way clients/companies like Baby Phat find models is to hold a model casting, which goes out to agencies located in the area where the gig is going to take place. So they search more than one agency to find models. For example, if Baby Phat has a print shoot in New York, then they will put out a casting call to all fashion agencies in the New York area like Ford, Wilhelmina, etc and those agencies will send out the models that Baby Phat is interested in.
Companies like Carters don't use any specific agency. They typically hire models from various agencies depending on where their location is.
Companies like Anthropologie put out open castings to local modeling agencies in their area so they are not technically tied to just one modeling agency. Whichever agency has the models with the right look is who they will choose to book their models from.
It's a combination of networking and marketing their models. Once an ad agency has a successful/positive experience with a modeling agency's model, it usually results in them going back to that same agency for future needs when it comes to models. Modeling agencies also send out their models' comp/zed cards to local clients to gain interest.
PHAT is a slang. It was used mostly among street kids meaning Pretty Hot and/or Tempting. Also known as "ultimate". Honestly, I advise you not to ever use this slang. It is completely outdated and you will probably be teased for the rest of your life if you ever say "That girl is phat!!" Most people don't even know what it means anymore and will probably think you mean "fat". The only time you should ever use this is if you are talking about the fashion empire Baby Phat/Phat Fashions.
You should look into agencies that list Delia's as an existing client. Some agencies post the names of companies they regularly supply models for on their websites. You'll want to find an agency that represents commercial/print and/or teen models.
Most prospective models use the services of an agency. Some agencies in Los Angeles are LA Models, VISION Los Angeles, Elite Model Management and Click Models.
A boutique agency in the modeling industry is one that operates on a smaller scale but still possesses all the characteristics of standard agency (i.e. use of contracts, agency commission, finding models work but submitting them to castings, etc.). They usually only sign a very limited number of new models each year and do so with the purpose of focusing on quality over quantity. Boutique modeling agencies tend to develop great working relationships with their models and clients because they have such a hands-on working arrangements and often know all their models by name.
There is no specific agency Tommy Hilfiger uses although it is likely that the brand chooses its models from the larger modeling markets like New York and Los Angeles.
A PSP phat battery will work in a PSP slim and lite, but bear in mind that a phat battery is deeper than a slim one, you will not be able to close the battery compartment using the origina battery cover.
The best way to find this kind of information is to look up the official website of the marriage agency, which more than likely will have an FAQ or requirements page for its models that you can use for reference.
Which TV show are you asking about? There are a handful of shows that use models on runways such as America's Next Top Model and Project Runway. If you are wondering who these models are, your best bet is to visit the TV show's official website. For shows like Project Runway, they hire out agency-represented models so that makes it difficult to find out who they are.
Businesses like the Children's Place use modeling agencies to find child models for their projects and campaigns. The best way to get your child this type of work is to get them signed to an agency that has a child modeling division.