After being woken up by music this morning, housemates gathered on the sofa to see posters up reading, 'Show Choir Rehearsals' and 'Big Brother High - home of the parrots'.
Realising that there may be a musical-related task, Rachel exclaimed: "I love High School Musical. They have the 'Wildcats', we’re going to be the 'Parrots'."
Andrew then went to collect instructions.
He began: "Housemates, for this week's shopping task the Big Brother house has been turned into Big Brother High and all housemates have become members of the Big Brother High show choir."
Andrew then recounted that housemates will be taking part in "two monumental challenges": a music video which must receive 100,000 hits online by 8pm Friday and a "very special duet" which two housemates will perform on this week's eviction show.
"To help housemates pass this huge challenge, Big Brother has invited a very special guest to stay at Big Brother High," Andrew continued, before a VT started playing on the television introducing Andrew Stone.
The housemates then applauded the dancer as he came down the house steps.
"Welcome to your new home," said Rachel, who was the most excited of the group.
"Who won the World Cup, Andrew?" asked David, before Stone reminded him that he cannot say.
Sitting down on the sofa, the group asked Stone how he felt about the experience.
"It's so weird how much has sprouted out of the first series of Pineapple," he said. "I'm now famous, I don’t see myself as famous - just so you know I'm here to help you guys, I'm on a level.
"It's my job to make you guys look good and I don’t know what abilities you guys are."
He then read out more task rules, which stated that all group members must participate in recording vocals today and filming the music video tomorrow. They were also informed that when cameramen enter the house to film the video, housemates are not allowed to engage them in conversation.
"Thank you for such a lovely reaction as I was coming down the stairs," Stone added.
"They're trying to make a bit of cash out of this, aren't they?" Ben said to David as they left the sofa.