Samsung realized a long time that it needs to make a special effort if it wants to catch the attention of the female audience (don't we all?!).
As a consequence, the Korean company came up with the La Fleur thing, which basically means giving popular Samsung devices a custom paintjob in order to specifically target the above mentioned audience.
The Galaxy S4 is clearly one of the company's most popular Android smartphones, so naturally it had to join the La Fleur lineup. Images of this particular model showed up on Twitter today, and is expected to be released before the MWC event next month, where Sammy may or may not present its upcoming Galaxy S5 flagship.
Obviously, it's no coincidence that the La Fleur Galaxy S4 showed up right before Valentine's Day - Samsung knows its marketing. Happy shopping, guys!