Jennifer Lopez, Hailey, and Justin Bieber lead stars reminding people to vote in eight US states

Eight states and the District of Columbia hold primary elections on Tuesday.

And some of the biggest stars in the world are making sure their millions of followers exercise their right to vote.

Jennifer Lopez, Shay Mitchell, Justin and Hailey Bieber all took to Instagram on Tuesday to promote voting in the US primary elections.

A-list: Jennifer Lopez led stars as they all took to Instagram on Tuesday to promote voting in the US primary elections

Making it clear: Jennifer, 50, posted a graphic reminding residents of those states to vote along with the caption: 'Your vote MATTERS. Be the change. Get out and vote. #BlackoutTuesday'

Making it clear: Jennifer, 50, posted a graphic reminding residents of those states to vote along with the caption: ‘Your vote MATTERS. Be the change. Get out and vote. #BlackoutTuesday’

 Pennsylvania, Indiana, Maryland, Rhode Island, Iowa, Montana, New Mexico and South Dakota in addition to Washington DC are all casting ballots on the biggest primary day in the COVID-19 pandemic era.

 Jennifer, 50, posted a graphic reminding residents of those states to vote along with the caption: ‘Your vote MATTERS. Be the change. Get out and vote. #BlackoutTuesday.’

Hailey, 23, also posted a black and white text image with the caption: ‘Verified If you live in any of these states, PLEASE go and VOTE. It is SO important!! TO MY FOLLOWERS WHO ARE FIRST TIME VOTERS: WE NEED YOU!!’

Justin, 26, acknowledge that he can’t vote as he is a Canadian citizen but urged his get their ballots in.

Committed: Justin and Hailey Bieber also took to social media to spread awareness

Committed: Justin and Hailey Bieber also took to social media to spread awareness 

Taking a stand: Hailey, 23, posted a black and white text image with the caption: 'Verified If you live in any of these states, PLEASE go and VOTE. It is SO important!! TO MY FOLLOWERS WHO ARE FIRST TIME VOTERS: WE NEED YOU!!'

Taking a stand: Hailey, 23, posted a black and white text image with the caption: ‘Verified If you live in any of these states, PLEASE go and VOTE. It is SO important!! TO MY FOLLOWERS WHO ARE FIRST TIME VOTERS: WE NEED YOU!!’

Big deal: Pennsylvania, Indiana, Maryland, Rhode Island, Iowa, Montana, New Mexico and South Dakota in addition to Washington DC are all casting ballots

Interesting: It is the the biggest primary day in the COVID-19 pandemic era

Big deal: Pennsylvania, Indiana, Maryland, Rhode Island, Iowa, Montana, New Mexico and South Dakota in addition to Washington DC are all casting ballots on the biggest primary day in the COVID-19 pandemic era.

Useful information: Hailey shared a very clear graphic of upcoming primaries

Useful information: Hailey shared a very clear graphic of upcoming primaries

'You can vote for me': Justin, 26, acknowledge that he can't vote as he is a Canadian citizen but urged his get their ballots in

‘You can vote for me’: Justin, 26, acknowledge that he can’t vote as he is a Canadian citizen but urged his get their ballots in

#BlackOutTuesday: Cardi B took a break from #BlackOutTuesday to remind her followers to vote

#BlackOutTuesday: Cardi B took a break from #BlackOutTuesday to remind her followers to vote

Vote him out: She also posted some Tweets from Trump to rally her fans to vote him out of office

Vote him out: She also posted some Tweets from Trump to rally her fans to vote him out of office

He wrote: ‘I’m Canadian so I can’t vote you can vote for me.’

Shay, 33, posted a much more colorful graphic from Rock The Vote with the caption: ‘Please send in your ballots!!!’ 

The primary is seen as the biggest test yet of officials’ readiness to manage a surge of mail ballots and the safety risks of in-person voting during the coronavirus outbreak.

The largest day of balloting since the pandemic began will serve as a dry run for the Nov. 3 general election, offering a glimpse of the challenges ahead on a national scale if that vote is conducted under a lingering threat from COVID-19.

Four of the states voting on Tuesday – Pennsylvania, Indiana, Maryland and Rhode Island – delayed their nominating contests from earlier in the year to avoid the worst of the outbreak that has killed more than 104,000 people in the United States.

Greater good: Shay Mitchell also made her voice heard

Greater good: Shay Mitchell also made her voice heard

Bright: Shay, 33, posted a much more colorful graphic from Rock The Vote with the caption: 'Please send in your ballots!!!'

Bright: Shay, 33, posted a much more colorful graphic from Rock The Vote with the caption: ‘Please send in your ballots!!!’

Hit the polls: Khloé Kardashian also reminded her 112million followers to hit the polls

Hit the polls: Khloé Kardashian also reminded her 112million followers to hit the polls

Rock the vote! Her sister Kim posted a reminded to her story

Rock the vote! Her sister Kim posted a reminded to her story

All of the states, which also include Iowa, Montana, New Mexico and South Dakota, have encouraged or expanded mail-in balloting as a safe voting alternative.

That has led to record numbers of mail-in ballots requested or cast in many states, along with an explosion of questions, confusion and reports of ballot applications delayed or lost.

Most states also will sharply reduce the number of in-person polling places as officials struggle to recruit enough workers to run them. 

Sounds good: Lizzo performed a song to encourage her followers to vote

Sounds good: Lizzo performed a song to encourage her followers to vote

Join the march: Zoë Kravitz captioned her reminder: 'March all the way to the voting booth'

Join the march: Zoë Kravitz captioned her reminder: ‘March all the way to the voting booth’

The primaries come amid a partisan brawl over voting by mail, which Democrats support as a safe way to cast a ballot and Republican President Donald Trump condemns as ripe for fraud. Numerous studies have found little evidence of voting fraud tied to mail-in ballots.

Former Vice President Joe Biden has essentially wrapped up the Democratic presidential nomination to face Trump in November, but seven of the states also will have primaries for state and congressional offices.

Among the top races to be decided on Tuesday will be a Republican congressional primary in Iowa. U.S. Representative Steve King, who has a long history of making racially charged remarks, faces a stiff re-election challenge after being largely abandoned by party leadership.

Socially distanced: A polling place at Kistler Elementary School in Wilkes-Barr, Pennsylvania is shown on Tuesday

Socially distanced: A polling place at Kistler Elementary School in Wilkes-Barr, Pennsylvania is shown on Tuesday

Read more at DailyMail.co.uk