The Katie Price lookalike had her odds slashed over the weekend after she became a more prominent character on the highlights show with her Tree of Temptation task.
Corin is now backed at 5/2 with Paddy Power to triumph at the end of the summer, ahead of Josie (11/2) and Steve (5/1).
Australian and former favourite John James has drifted to 7/1 following his spats in the house with Josie and Rachael. Meanwhile, the current long-shot outsiders are Sunshine (50/1), Dave (50/1) and Govan (66/1).
Paddy Power are also taking bets at 11/1 that the winner of the eleventh run will be a housemate who has yet to enter the show.