Barbra Streisand shows her class.

It was an evening that elicited tears, standing ovations, raucous laughter and shouts of joy from the audience _ and was just in the first few minutes.

Yes, Barbra Streisand’s return to touring after a 12-year absence was the extravaganza that it promised to be. Monday night’s show at Madison Square Garden was the third stop of a 20-city jaunt across the nation _ a virtual lovefest between the ultimate diva and an adoring, sold-out, celebrity-dotted crowd.

Streisand effortlessly crooned through a select repertoire of the hits she’s amassed during her four-decade-plus career. But night’s most riveting moment came during what was perhaps the only unscripted _ and truly uncomfortable _ episode in the three-hour show.

There was Streisand, enduring a smattering of very loud jeers as she and “George Bush” _ a celebrity impersonator _ muddled through a skit that portrayed the president as a bumbling idiot.

Though most of the crowd offered polite applause during the slightly humorous routine, it got a bit too long, especially for a few in the audience who just wanted to hear Streisand sing like she had been doing for the past hour.

“Come on, be polite!” the well-known liberal implored during the sketch as she and “Bush” exchanged zingers. But one heckler wouldn’t let up. And finally, Streisand let him have it.

“Shut the (expletive) up!” Streisand bellowed, drawing wild applause. “Shut up if you can’t take a joke!”

Well, that about sums up the moonbat Left’s response to any criticism, doesn’t it?

Maybe she’ll end up with a guest lecturer position at Columbia University.