I just checked the odds. The exact same thing happened with Sam in BB14. Under the radar for the whole series, bar the last 10 days. This is the perfect time to increase in popularity. In BB14, Dexter and Gina's popularity dropped in the last week, in BB13, Deana's did too. There should be a BB phrase, "the plummet of a series favourite in the last week" or "an final week unknown HMs sprint to the finish"

Betfair showing Callum shortening to win at an alarming rate.

Katie H- 2.42
Keith- 4.3
Callum- 6.6
Perez- 8.4
Katie P- 13.5
Michelle- 38
Kavana- 140

Eviction odds has Kavana as hot favourite to go followed by either Michelle or Pricey. Callums odds to go are now 20/1

So does this mean a BB secret has been finally unveiled? The perfect gameplan for furture HMs...stay under the radar for all the series bar the last week (so you don't get nominated) and then wake up in the final week when nominations are over.

Good. Would have Callum over perez any day

He's done a little more than Kav but they can leave together. I remember him smoking and losing his temper once that's about it.

Eurgh No please can't bear Callum winning

Katie H, Keith & Calum for first, second and third would be bliss! Hope Perez has to go in a duo. Ha!

It's quite odd how similar it is to BB14 when on polls Gina was dominating with 40% of the vote whilst having 10 people in there, and Sam was getting 2-3%. And was at 50/1 to win at one time, and then increasing to 4/1 in the last few days! Same thing is happening.

I don't mind him staying 'til Friday because I want Michelle and Kav out, and that now looks like a real possibility. I want to hear what Michelle has to say for herself.

Unlikely...he hasn't really done enough.

I haven't checked today, but there was massive support for Calum on Twitter last night

Sam was the obvious anti-Dexter/Gina vote. ATM Keith is more likely to be the anti-KH/Perez vote.

He's actually done much more than Sam did in BB14 during 10 weeks. And he won. I reckon Callum may get the "anyone but Perez or Hopkins" vote, which is probably quite strong. Him or Keith will get that.

If we go by Twitter, Callum and Keith were by far the most favoured HMs.

If that's the price of stopping Hopkins I'd take it.

Not only has this Callum rise helped the show in regards to making the finale a four-horse race rather then three it is the way in which he has done so which I find the most appealing.

I would make the argument that about 80% of the support for Hopkins stems from her position as the anti-Perez candidate, but now as we've seen on the online clips Hopkins is now beginning to make amends with Perez and align, and whilst you may argue that it's done so the public can see Hopkins as "a changed woman who was nice all along" It's also taking away the reason for voting for her in the eyes of a lot of viewers. At the same time Calum is emerging as the anti-Perez candidate in her place and is garnering momentum from it, and as a result the anti-Perez vote is split in the same way that the anti-Hopkins vote is being split between Keith, Perez and to a lesser extent Pricey as well as slowing down Hopkins support.

As well as this there are punters to think about, I know people make jokes about betting syndicates but I do feel punters do sway the show a lot more in the modern era, taking long odds candidates and capitalising on momentum to bring about results which earn them much money, I felt it played a part in BB15 with Tamara, Matthew and Winston's boots as well as Hell-beast winning. Punters aren't going to find appeal in someone with short odds such as Hopkins or Keith, but a guy with an established support base due to being an attractive male who had long odds when the vote to win lines opened would be perfect.

Or maybe I'm just thinking too much

So long as Hopkins or Perez don't win I'm not bothered although personally I'd go for Keith over Callum.

Why is he favourite??? He's a boring arse pretty boy with no substance or personality. The guy is a wet lettuce. I do not get the appeal or why he is considered attractive either. I'd rather Hopkins win than him, at least she's entertained me!!

Hope so. Excellent news

Me too. In fact I'd rather anyone than Hopkins win.

Really Twitter isn't a reliable poll you only have to look at X-factor and the boy bands would always be top trending about voting for them and how amazing they are, and most of the time they would be in the bottom 3.

I really like Calum but there is no chance in hell he will win.

Exactly. Sam and Keith were both nice guys throughout, while Calum has been seen in lots of arguments. Calum has also picked a side, whereas Sam and Cheggers made a solid effort to get along with everyone while standing a bit apart.

Dul'em aint winning nowt

I said from day one either Keith or Calum would win this but that was before Pricey went in ,Wouldn't be at all surprised if it hasn't been set up for her to take the Crown ,what with her getting an Entrance night all to herself so the spot-light was on her and her only ,Also what with her Ex winning ,Can't see Katie taking the chance of Alex upsurping her

Well at least it opens up the betting a bit. Even if the end result doesn't go the way I want, it can at least be entertaining and unpredictable along the way.

Agree that it could be the anti-Perez vote switching from Hopkins to Calum.

It would be funny after so much attention was given to them if neither Perez or Hopkins make the top 2, and it's Calum and Keith instead.

It would make a more satisfying ending as well, the two power players of the series take such extreme shots at one another that in the end both of them throw away the win.