Now, granted, Levine (who kinda loved her response, too) wasn't totally talking out of his ass. Keys wrote an empowering piece about ditching lipstick, eyeliner, and the whole shebang for Lenny Letter in May 2016. As she said at the time:
Every time I left the house, I would be worried if I didn't put on makeup: What if someone wanted a picture?? What if they POSTED it??? These were the insecure, superficial, but honest thoughts I was thinking. And all of it, one way or another, was based too much on what other people thought of me ... I don't want to cover up anymore. Not my face, not my mind, not my soul, not my thoughts, not my dreams, not my struggles, not my emotional growth. Nothing.
As she says herself, we can do whatever the f*ck we want, because we're much more complicated creatures than one comment made at one point in time would indicate.
Unfortunately we've become so obsessed with putting people into itty-bitty little boxes in this world that it's rare when we acknowledge that people can think many things at the same time. Just look at your Facebook feed, and you'll see what we mean. People are judged pretty harshly for changing their minds, and the fact that comments live forever on the Internet makes it hard to escape calls of hypocrisy.
But we're human. We DO change our minds! Sometimes it's because we've grown up and broadened our horizons since we made one particular comment. Other times we're simply acknowledging that it's possible to believe two things at the same time, even two things that may seem diametrically opposed, because we can follow one path primarily and dabble a bit in the other.
A mom can prefer to feed her kids a mostly organic diet and take them to Mickey D's on the rare occasion for a treat. An adult can post something in support of a certain political cause on Facebook and still care about other political causes even if he or she doesn't mention those specifically.
And yes, a singer can refuse to wear makeup one day and slather it on the next. And that is totally fine.