Complex sentence: Jenny improvises, proposing that Serena and the socialites walk the runway but Blair switches the final dress with one that Jenny made, despite this the dress is a huge hit with the audience and the fashion show is a big success.
Split into simpler sentences: Jenny improvises, proposing that Serena and the socialites walk the runway but Blair switches the final dress with one that Jenny made. Despite this, the dress is a huge hit with the audience and the fashion show is a big success.