Did you know that induced vomiting is a compliment? Cue NBC's "The More You Know" logo!

Last night was the 2013 Met Gala and all the stars tried to outdo each other in the punk theme.

Nicole Richie was there, and apparently Rihanna approved of her wardrobe, because RiRi tweeted...

If anyone else wrote it, it might be considered an insult. But this is Rihanna's way of putting Nicole on the Best Dressed list. That's hot!

What do you think of Nicole's look? Check out more Met style in the gallery below.

Source: @Rihanna