Earlier today, Barack Obama's birth certificate was released by the White House, after speculation regarding the legitimacy of his presidency.
Following the disclosure, Republican Trump claimed that his pressure on the Democratic administration had led to the publication of the document.
Cher, who is an outspoken supporter of Obama, struck out at the entrepreneur, writing on the micro-blogging site: "Donald Trump is Pompous Asshole! Saw him in Aspen with one Dcup chick after another Everyone up there thought he was a complete idiot (sic)"
She added: "Donald Trump (mr champter11) is Only a Mean Spirited BAD ACTOR who couldn't find his ass with both hands & a map!"
Trump recently claimed that the Obama campaign is fearful that the Apprentice star may run for president.