Zac Efron's not the most popular celebrity on Twitter right now, and it's all because of a tweet he posted for Martin Luther King Day on Jan. 18.

Alongside a picture of himself in a pair of aviators, the 28-year-old wrote, "I'm grateful for a couple things today: Martin Luther King Jr & 10 million followers on IG."

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Fans were not enthused that the Neighbors star lumped his social media achievement in with the civil rights leader's accomplishments in the now deleted post.

https://twitter.com/loudersoft/status/689329962843688960

Do you think Zac's post is inappropriate?