Australia’s Big Brother dropped a blonde bombshell on their housemates when Pamela Anderson made an entrance.

The former Baywatch babe and Playboy centrefold caused a sensation as she walked in wearing a skimpy red dress.

Contestants were initially asked to be reporters and photographers as a mystery guest paraded behind a screen.

Pammy posed for snaps as the confused housemates said: “Was that really her?”

Hot-blooded bricklayer Rory was asked to go to the diary room and meet the new guest.

He cuddled up next to the star in the chair and stole a few glances at her cleavage.

Looking tanned, she was then introduced to the rest of the housemates before being given a tour of the house.

Asked how long she would be there, Pammy replied: “I just got off the plane. I’m here for a couple more days.”