Fans inspired by Kylie's famously plump lips started a hashtag to show off the results of their own attempts to boost their pout – in some less than advisable ways.
Now, Kylie, 17, has had her say.
She tweeted: "I'm not here to try & encourage people/young girls to look like me or to think this is the way they should look. I want to encourage people/young girls like me to be YOURSELF & not be afraid to experiment w your look."
The Kylie Jenner Lip challenge saw hundreds of young people uploading pictures online showing their attempts to get a bigger pout.
But while Keeping Up With The Kardashians star Kylie credits her plump lips to clever lip liner technique, the young people were embracing other methods to give a fuller look, including sucking on bottle tops and shot glasses.
It works by placing your lips around the top and sucking out all the air.
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