Well this is all rather Passion Pit-y, now isn't it?
La Chansons make adorable electro pop about adorable things. Take, for instance, "Sparklin", which discusses falling in love at a roller disco. At a ROLLER DISCO. That is just cute.
Like with most bands of this ilk, the Passion Pit comparisons are going to exist, and while they are valid, I'd say La Chansons succeed in a slightly different way; yeah, the beats are comparable, but La Chansons are effective more based on their storytelling than on an over-the-top sugar rush.
But yes, they are both quite lovely.
La Chansons - "Sparklin" (Download)