Celebrity Big Brother housemates were covered with the likes of custard, fish guts and cat food as US singer Sisqo failed to complete song lyrics as part of a task.

As part of the karaoke challenge, Sisqo was required to sing along to six tracks with the help of on-screen lyrics in the diary room.

However three lyrics were missing from each song, and each time Sisqo sang the lyrics incorrectly, an alarm bell sounded and a turntable in the garden with six housemates on would stop.

Singer Bowers bore the brunt of custard and fish guts, while rapper Sov was covered in cat food as they and Vinnie Jones, Stephanie Beacham, Alex Reid and Nicola Tappenden paid the price for Sisqo failing to complete four of the six tracks.

Sisqo was able to complete his own hit The Thong Song and Freak Me by Bowers’ former boy band Another Level, but failed on Livin’ On A Prayer by Bon Jovi, 90s chart hit Saturday Night by Whigfield, Chris De Burgh classic Lady In Red and All I Ever Wanted by fellow housemate Basshunter.

However housemates will be given two hampers – one containing luxury condiments and one with mystery contents – as a result of Sisqo completing two songs correctly.

Meanwhile, housemates showed their increasing anger with Sov and her lack of housework.

Stephanie said of the north London rapper, who faces eviction on Monday night alongside glamour model Nicola: “She’s a despicable non-entity who hasn’t been brought up well.”

Even preaching actor Stephen Baldwin criticised her, saying: “Somebody’s doing her work, somebody’s carrying her load – and it’s not fair.”

But footballer-turned-actor Vinnie seemed confident that Sov’s time in the house would soon be up. “We’ll see if her or Nic goes,” he told the group.

“She’s got to be up against somebody who has got a bit more power than what she’s been up against, because her little 150 people of a fan base ain’t going to keep her here for that long.”