In just one short week, we have made lightyears of progress in the advancement of celebrity butt Instagrams.

A photo posted by @chrissyteigen on

What a time to be alive! I thought I would have to wait my whole career as an Instagram Butt Writer to see this many instagrammed celebrity butts. But in just eight days, the entire industry has been transformed. Remarkable!

First, we saw Marc Jacob's butt by accident. Then, we saw Justin Bieber's butt on purpose. And now, John Legend enters the mix.

Chrissy Teigen, Legend's wife and Instagram nipple transparency advocate, posted the above photograph. She tagged Instagram, which I read as a callout of the company's sexist policy of taking down photos showing female nipples, but not other stuff (male nipples, celebrity butts). That's right, you might have been too distracted by John Legend's naked body to realize that this is a highly political butt photo (I think).

Sources: Defamer