Former Pink Floyd rocker Roger Waters is praying U.S. presidential hopeful Hillary Clinton doesn't get into The White House - because he's certain she'll start a war with Iran.

The British bassist hopes Clinton's Democrat rival Barack Obama runs against Republican candidate John MCCain in the U.S. general election later this year (08).

And Waters admits that, despite not being an American, he was devastated when Clinton won a recent key primary vote in Texas, keeping her in the Democrat race.

He says, "I'm a huge fan of Barack Obama. I was so disappointed the other night when the ghastly Hillary got Texas and kept the whole thing going. Please God, let's not have this woman.

"Hillary will want to make her mark and show that she can be just as good as a male president, and she will f**king invade Iran. Trust me. She voted to declare the Iranian Republican Guard a terrorist organization.

"I would buy a whole page in The New York Times and fly Obama's flag. But I would be terribly afraid they'd (Americans) go, 'This is that pinko s**tbag who's attacking our president in a time of war.'"