Having played a show in Dublin's 3Arena pop music icon Cher had a serious message for her fan, Ireland's leader Leo Varadkar, about the proposed Shannon LNG project, in County Kerry.

Some of the Irish tabloids were reporting last week that Taoiseach Leo Varadkar was dying to have Brexit in the rearview mirror on the October 31 deadline so he could properly kick back and enjoy one of his idols, Cher, who played Dublin’s 3Arena on November 1.

Well, Brexit is still unresolved, and there were no sightings of Leo at the sold-out Cher show, but the singer did leave him a little souvenir – a letter that urged him to ban fracking and all of its offshoots in Ireland.

Read more: Mark Ruffalo implores Ireland to oppose fracked gas terminal

Just in case the letter got lost in the mail, Cher helpfully posted it on her social media accounts on Sunday. “I know the Irish people don’t need actors and singers from Hollywood getting into their business but it’s because we care and we have had experience with the kind of people & companies who frack and sell the gas,” she wrote on Twitter.

I know the Irish people don’t need actors and singers from Hollywood getting into their business but it’s because we care and we have had experience with the kind of people & companies who frack and sell the gas !!… https://t.co/WOrHj9eV0f

— Cher (@cher) November 3, 2019

The letter itself, addressed to “Taoiseach Varadkar,” was signed by writer/director Michael Moore, actor Mark Ruffalo and a bunch of other groups that are anti-fracking. Specifically, it referred to the proposed Shannon LNG project in Co. Kerry that would use fracked gas imported from the U.S., even though fracking itself is banned in Ireland. Leo hasn’t said that he’ll give it the green light, but he’s also suggested that the project could ensure “energy security” for Ireland.

"I implore you not to continue this terrible process by bringing that gas to you.” - On The Tonight Show @MarkRuffalo calls on the Government to withdraw support for for the Shannon LNG gas terminal project amid claims it will allow fracked gas into Ireland. #TonightVMTV pic.twitter.com/vsD1HTAfLP

— The Tonight Show (@TonightVMTV) October 23, 2019

Cher took in some sights during her time in Dublin, including the Halloween display at Merrion Square.

Read more: Irish leader supports a united Ireland in accordance with Good Friday Agreement

Iconic pop star Cher.Getty