*Whitney Houston has been dragged into the tabloid scandal involving “Today” host Matt Lauer and his rumored mistress, because the woman is a singer who reportedly claims to be Whitney’s half-sister.

Hours before Lauer and his wife Annette released a statement angrily denying that they had split, the Web site Hollyscoop reported that Lauer met Alexis Houston several years ago when she accompanied Whitney’s cousin Dionne Warwick to the “Today” show.

The gossip site goes on to claim that Lauer reached out to Alexis as recently as the Winter Olympics, saying she was apparently at the sporting event to sing in place of Whitney who reportedly ditched the gig.

Whitney’s rep has come out swinging against the allegations, telling E!: “Alexis Houston has no relation to Whitney in any way, shape or form. Whitney was never scheduled to perform at the Winter Olympics.”

Meanwhile, a rep for Alexis Houston has also denied any relationship with the TV host, telling one Web site: “Ms. Houston has never had any sort of relationship with Mr. Lauer and does not even recall meeting him.”

A post on Twitter page @alexishouston also reads, “Our official statement is that the allegations regarding Ms. Houston are totally false.”