If you are gonna go Lanvin styleé you have to go dressy. Lanvin is all about dress up; bow ties. patent shoes, waistcoats, shawl collars.
Here are TheChicGeek's picks of the new Lanvin for H&M collection. This stuff wont hang around, so good luck!
There are some great coloured shoes in the collection and nothing says 'party' like a shiny shoe. This bronze is a great colour and would look great with wide legged velvet or corduroy evening trousers.
It wouldn't be Lanvin without a bow tie. Alber Elbaz is never seen without his. Check out this cute leopard print number.

It's a high-street collection so go frivolous, a white shawl collared dinner jacket anybody?
This waistcoat is cool, it gives the effect without wearing too much.

This bib-front shirt in this chic putty colour will have everybody thinking you're wearing mainline Lanvin.