Katy Perry went to her first Met Gala in 2009. The singer has been making bold appearances at the event for many years since then.

For her Met Gala debut, rapper Cardi B made a show-stopping entrance in a Moschino gold and cream pearl-encrusted gown, complete with a halo headpiece and matching opera gloves. The sultry bodycon dress weighed 30 pounds and was made grander by a voluminous bustle skirt that opened into a train.

As we await the day, which is something like a cross between the Superbowl and Oscars for fashion, let’s take a look back at the 6 very best Met Gala themes over the years according to me, a fashion editor who is obsessed with this kind of thing.