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What cheating rumors? Never heard of it!

LeAnn Rimes seems pretty confident that her main man Eddie Cibrian isn't having an affair with his ex wife, despite reports - the singer posted this pic on Twitter of her smooching on him the other day...

"Kisses!" reads the photo caption. Aw, how adorbs.

Cibrian Tweeted his own denial of the story: "Once again my ex has stooped to a new low attempting to sabotage my beautiful relationship with LeAnn."

Ouch. Poor Brandi Glanville. Who's telling the truth here?