Kate Middleton stepped out last night with hubby William to attend a charity gala in London wearing a long-sleeved scarlet gown by Beulah London. Pippa Middleton donned that red slinky Temperley number last week for a celebrity boxing match. We know by now that Pippa's style is a bit flashier than her sister's but that's a pretty plunging neckline on Kate's dress. And they've both been wearing a lot of red lately. So trendy! Which royal red look do you prefer?