@kelly_clarkson / Twitter 1 / 6
@kelly_clarkson / Twitter 1 / 6

Mom-to-be Kelly Clarkson has slammed outrageous rumors her new husband Brandon Blackstock is involved in an extramarital affair and expecting a child with another woman.

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The "Since U Been Gone" hitmaker recently became the subject of tabloid fodder when a woman came forward claiming she was having an affair with Blackstock and was five months pregnant with his child.

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However Clarkson finally spoke out against the rumours on Friday, taking to Twitter to deny the allegations. She writes, "Keep hearing random rumors of me & Brandon splitting or that's he's cheating on me. Stop with all the lying please. "False rumors don't bother me & Brandon but they do affect the lives of our 12 & 7 yr old. They're kids & don't get that people can print lies."

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Blackstock's two children are from a previous relationship.

He wed Clarkson in October and just weeks after tying the knot, the singer announced she is pregnant with her first child.