Singer Barbra Streisand, a huge fan of Hillary Clinton, is using her vocal skill to attack Republican nominee Donald Trump.

At an LGBT fundraiser for Clinton on Friday night, Streisand vented her feelings about Trump in song.

The singer performed a parody of the Stephen Sondheim classic Send in the Clowns with lyrics about the Republican nominee.

“Is he that rich, maybe he’s poor, `til he reveals his returns, who can be sure?” Streisand sang to an applauding crowd of about 1000.

“Something’s amiss, I don’t approve, if he were running the free world, where would we move?”

Streisand shows Trump no mercy. Photo: donaldjtrump.org

Streisand preformed before a large effusive crowd at the New York City fundraiser.

She followed Clinton, who stressed her support for the LGBT community and said, “We all love this woman, either from afar or luckily enough up close.”

The event raised money for the Hillary Victory Fund, a joint fundraising committee between Clinton’s campaign, the Democratic National Committee and state parties.

Contributions ranged from $US1200 ($A1589) to over $US250,000.

Streisand included renditions of People, Pure Imagination and Happy Days Are Here Again.

But her Trump parody clearly stood out. It continued: “And if by chance he gets to heaven, even up there, he’ll declare chapter 11. This sad, vulgar clown. You’re fired, you clown.”