Katia Ivanova is the odds-on favourite at 2-5 to be evicted first from the Big Brother house, according to Betfair customers.
The 21-year-old former girlfriend of Rolling Stones guitarist Ronnie Wood was nominated by her fellow housemates for eviction on Sunday, along with Heidi Fleiss (3-1) and with Lady Sovereign (16-1).
Ivanova looks set to go after angering the public via her flirtatious bed-sharing antics with Jonas Altberg, despite the two of them having partners on the outside.
Sisqo is the new favourite to win the show at 3-1 while Vinnie Jones (7-2) remains hotly tipped to go the distance.
New housemate Ivana Trump on the other hand is being given little chance of success, with her odds to triumph standing at a lengthy 84-1. Footage of the nominations will be shown and voting lines will be opened on Monday.
Betfair spokesman Ari Last said: "Katia's behaviour in recent days has not gone down too well with the public and our customers seem certain that it will prove her downfall when voting lines open on Monday."
Celebrity Big Brother 2010 1st Eviction: Betfair bet - 2-5 Katia Ivanova, 3-1 Heidi Fleiss, 16-1 Lady Sovereign
Celebrity Big Brother 2010 Winner: Betfair bet - 3-1 Sisqo, 7-2 Vinnie Jones, 5-1 Lady Sovereign, 6-1 Jonas Altberg, 11-1 Stephanie Beacham, 24-1 Nicola Tappenden, 31-1 Dane Bowers, 37-1 Alex Reid, 39-1 Heidi Fleiss, 49-1 Stephen Baldwin, 84-1 Ivana Trump