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Justin Timberlake might reportedly be facing prison.

Sadly, it was all the result of a good deed - in that he was trying to encourage his fellow Americans to vote.

As part of his support for #RockTheVote he posted a picture of himself voting in a polling station.

The singer flew from Los Angeles to his hometown of Memphis, Tennessee to cast an early ballot ahead of the November 8 US presidential election and shared a picture to his Instagram.

JT wrote to his 37 million followers: "No excuses, my good people!

"There could be early voting in your town too. If not, November 8th! Choose to have a voice! If you don't, then we can't HEAR YOU! Get out and VOTE!"

However, it is illegal to take a photograph in a voting booth in 18 states in the US, including Tennessee, landing offenders up to 30 days in jail or a fine of $50 (£41), or both.

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The District Attorney's office said it had been "made aware of a possible violation of state election law" and the matter was "under review".

But in a second statement, Shelby County District Attorney Amy Weirich said the initial response was "incorrect" and "released without [her] knowledge".

"I am out of town at a conference. No-one in our office is currently investigating this matter nor will we be using our limited resources to do so."

Any charge would have been considered a misdemeanour punishable by up to 30 days in jail or a fine of $50 (£41), or both.

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A spokesman for the Tennessee Secretary of State added that people should only use their phones for help with voting but officials are "thrilled Justin can't stop the feeling".

It comes after Snapchat fought to legalise ballot selfies in April. In a statement, the company said: "A ballot selfie - like a campaign button - is a way to express support for or against a cause or a candidate.

"And because it is tangible proof of how a voter has voted, a ballot selfie is a uniquely powerful form of political expression."

From: Digital Spy