Celebrity Big Brother, I'm a Celebrity… Get Me Out of Here!, Strictly Come Dancing… these shows provide a valuable service. Not only do they give us hours of entertainment, but they make us see those celeb types in a whole new light. That could be a good thing… Or a terrible thing.

With 17 series of CBB in the bag, 16 runs of I'm a Celebrity and 13 editions of Strictly, we've seen plenty of famous faces rowing, romancing and rumba-ing for our entertainment. And those are just the big three franchises. Some celebrity contestants stand out more than others, so here are just 12 of the most notorious, in increasing order of jaw-droppitude:

12. REBECCA LOOS (THE FARM)

Rebecca Loos presumably went into The Farm to change her public image and, well, in some ways she succeeded. Certainly, the first thing you think of when you hear Rebecca Loos' name is not her alleged affair with David Beckham. Whether or not 'the woman who masturbated a pig' is the identity she wanted instead is a matter for debate, though. 

11. PAUL DANAN (CELEBRITY LOVE ISLAND)

We don't know why, but the mere mention of Paul Danan can make us crack into a smile. The Celebrity Love Island lothario effortlessly epitomises the guilty pleasure/so-bad-it's-good feel of tacky early '00s reality shows. And let's not forget that he became part of a spinoff trio in the ridiculously named Calum, Fran and Dangerous Danan. When he made a return to Love Island for a chat with Caroline Flack last year we almost wet ourselves with excitement.

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10. JOHN SERGEANT (STRICTLY COME DANCING)

Right, bear with us. John Sergeant is not the best dancer ever to appear on Strictly Come Dancing. By quite some distance, if we're being honest. But John was the first celebrity to really turn the show into a media storm. 

With his terrible, terrible routines (oh God, that paso doble), John managed to spark watercooler conversation and newspaper columns galore. He'd have rated higher if he hadn't quit the show - imagine if he'd won, imagine! - but for being the first celeb to really get people gossiping about Strictly, he's won a place in the reality TV history books. (Sorry, Ann Widdecombe - you were a pale imitation.)  

9. MYLEENE KLASS (I'M A CELEBRITY… GET ME OUT OF HERE!)

Depending on how you feel about those shower scenes on I'm a Celebrity, you have Myleene Klass to either thank or despise. After all, she was the first celebrity to turn a simple case of 'being hygienic' into something else altogether, with her notorious white bikini helping her along the way. Props to Myleene, though, who auctioned off that two-piece for a whopping £7,500 and donated the money to charity. Not only did she change I'm a Celebrity forever, but she's benevolent too. What more could you want?

8. JIMMY BULLARD (I'M A CELEBRITY… GET ME OUT OF HERE!)

We always knew that Jimmy Bullard would be a genius contestant for the jungle - if only because it gave us an excuse to watch him trying to film his profile for Sky Sports News over and over again. Sure enough, Jimmy was a brilliant campmate, from his bromance with Foggy to his ridiculous sense of humour. But then it all soured with some bro-ing up gone wrong with Jake Quickenden ("Your banter's shit mate!") A potential winner, Jimmy ended up being booted out of camp first… but at least he showed us every single side of himself during his time Down Under.

7. LEE RYAN (CELEBRITY BIG BROTHER)

Lee Ryan's series of Celebrity Big Brother was a complete classic (Lionel Blair yelling: "Little shits! Selfish bitches!" will always be one of our favourite CBB moments). But one of the reasons it was so good was thanks to Blue's Lee Ryan, who was completely baffled about what was happening around him on a daily basis… And yet still managed to be a huge lothario. 

After he'd concocted a love triangle composed of himself, Casey Batchelor and Jasmine Waltz, Lee was all we could talk about every single day. And still, every now and then, we suddenly just stop what we're doing and think: "What on Earth was that about?"

6. GILLIAN MCKEITH (I'M A CELEBRITY… GET ME OUT OF HERE!)

One of the most common parts of I'm a Celebrity is seeing the same celebs being voted to take part in Bushtucker Trials over and over again - Katie Price, Helen Flanagan, the list goes on. But one of the most notorious I'm a Celeb-ers has to be Gillian McKeith, who we just couldn't resist torturing (especially when she refused to eat bugs because she's a vegan). 

Difficult in camp and moany on Trials, Gillian was all anyone could talk about - and then there was that faint when she got voted to take on yet another challenge. It's easily one of the most discussed I'm a Celeb moments ever.

5. PEREZ HILTON (CELEBRITY BIG BROTHER)

Whatever you think of Perez Hilton - and people do have a lot of opinions on Perez Hilton - there's no denying that he was an astonishing Celebrity Big Brother housemate. His utterly bizarre behaviour had tongues constantly wagging (appropriately, given how fond he was of sticking his own tongue out). 

From his "sexy" dancing to his blow-out rows with Katie Hopkins, to his staggering ability to make everything about him (including when Chloe Goodman was upset about Jeremy Jackson opening her dressing gown), it was definitely The Perez Show. Whatever Katie Hopkins might say.

4. LADY COLIN CAMPBELL (I'M A CELEBRITY… GET ME OUT OF HERE!)

Any celebrity who calls the viewing public "oiks" is easily going to make it into a ranking of the best reality TV stars ever. Lady C might not have been the most recognisable name in 2015's I'm A Celebrity line-up, but she quickly became the only campmate that anyone could talk about. 

Her notorious rants and fantastic vocabulary - as well as the marvellous way in which she managed to rub every single other celebrity up the wrong way - were completely addictive, and she certainly made her mark on the jungle. It's just a shame that she chose to quit. 

3. GEORGE GALLOWAY (CELEBRITY BIG BROTHER)

"Would you like me to be the cat?" No, George, we're alright, thanks. And yet, with those eight words George successfully became one of the most infamous CBB contestants of all time. That's without us mentioning the time he danced around in lycra with Pete Burns, or the time he got Preston all riled up for arguing with Michael Barrymore ("Poor me, poor me, pour me a drink!") 

But the best thing about the whole affair was that as an MP, he probably shouldn't have really been there in the first place, prompting politicians to line up to talk about CBB. That's when you know you're on to a good thing.

2. CHANTELLE HOUGHTON (CELEBRITY BIG BROTHER)

Does she… count? It might be bending the rules slightly to put Chantelle in here given that the whole point of her was that she wasn't a celebrity… but then she was on a celebrity reality show. And what a housemate she was. 

Her warm-hearted, slightly ditzy demeanour completely won over the nation, and her budding romance with Preston was more gripping than pretty much any other reality TV relationship ever. Plus, her game, cute performance of 'I Want It Right Now' by Kandyfloss (with a K) was one of the most endearing things ever on TV. As someone who flipped the whole idea of celebrity reality shows on their head - and was also very sweet - Chantelle sailed into the reality TV history books.

1. JACKIE STALLONE (CELEBRITY BIG BROTHER)

"Yeah, Jackie." What else do we need to say? Iconic.