President Trump has labelled Chrissy Teigen "filthy mouthed" - and her response has gone viral.
In a series of tweets the President attacked both John Legend and Chrissy Teigen for not giving him credit over supporting criminal justice reform.
Calling John "boring", Mr Trump said he didn't see the two of them "around when we needed help getting it passed".
Chrissy's response was turned into a swear word-filled hashtag which has been trending worldwide.
It's the latest episode in the long-running feud - with President Trump having previously blocked Chrissy on Twitter.
....musician @johnlegend, and his filthy mouthed wife, are talking now about how great it is - but I didn’t see them around when we needed help getting it passed. “Anchor”@LesterHoltNBC doesn’t even bring up the subject of President Trump or the Republicans when talking about....— Donald J. Trump (@realDonaldTrump) September 9, 2019
Donald Trump's comments came after a show on American channel MSNBC about criminal justice - which featured Chrissy's husband John Legend.
The President said:
When all of the people pushing so hard for Criminal Justice Reform were unable to come even close to getting it done, they came to me as a group and asked for my help. I got it done with a group of Senators & others who would never have gone for it. Obama couldn’t come close....— Donald J. Trump (@realDonaldTrump) September 9, 2019
.....the importance or passage of Criminal Justice Reform. They only talk about the minor players, or people that had nothing to do with it...And the people that so desperately sought my help when everyone else had failed, all they talk about now is Impeaching President Trump!— Donald J. Trump (@realDonaldTrump) September 9, 2019
Chrissy responded with this:
But after her response starting trending, both John and Chrissy urged their fans to not tweet it.
"Please don't make this foul mouthed hashtag trend," tweeted John.
And Chrissy called it her "fight" with the President.
What's the truth about reform?
In December 2018, President Trump signed into law the First Step Act - which will reduce the compulsory minimum prison term for people who commit non-violent drug offences on a case-by-case basis and better prepare people in jail for life after prison, through education and vocational workshops.
He claims "Obama couldn't come close" in his efforts for criminal justice reform.
But reducing racial disparities in the criminal justice system has been a project for both the Obama and Trump administrations.
And in 2010 President Obama signed the Fair Sentencing Act into law - which removed mandatory five-year sentences for first-time offenders.
The First Step Act builds on what Obama did and goes beyond that too.
So in reality, both have taken steps to achieve reform.