'She saved my life': Mel B URINATES on Bear Grylls' hand on TV after he sustains painful jellyfish sting in survival show Running Wild

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She's the artist formerly known as Scary Spice.

But Spice Girl Mel B, 41, proved that not much scares her, this week, after she was filmed urinating on British adventurer Bear Grylls, 42, when he sustained a jellyfish sting on his hand during their Welsh adventure.

The tables turned for Bear on Wednesday's episode of his NBC show Running Wild With Bear Grylls, when Mel's survival instincts had to be called into action. 

In the wild: Mel B had quite the adventure on Wednesday's episode of Running Wild With Bear Grylls when she was forced to urinate on the survival expert following his jellyfish injury

Bear sustained the injury when he dropped the jellyfish as he tried to show the Spice Girl how it can be boiled up for a protein-rich meal. 

Mel immediately recalled what she'd so-far only seen in movies and asked the injured adventurer: 'Do you need me to pee on you?'

The musician refused to let Bear pee in front of her and instead offered 'two or three times' to provide some urine.

A reluctant Bear was forced to take Mel up on the offer since he had relieved himself on the rocks, just 10 minutes before.

Jellyfish sting: Bear was stung by a jellyfish and accepted Mel's offer to pee on his finger

Medical aid: Mel guided Bear's hand as she helped him with his sting

Joking that it was 'so inappropriate,' Mel's modesty was blurred out as she pulled down her trousers with Bear looking away and advising her: 'Take my hand and guide it.'

She was shown smiling awkwardly as she struggled with her task, saying she had 'stage fright' and crying at first: 'I can't do it - it's not coming!'

Later, she told the camera: 'To pee on demand, when someone's in pain, is very difficult.'

Their faces finally showed that she managed, with Mel smiling at Bear: 'There you go. Don't say I don't do anything for you.'

Then the fun-loving popstar added: 'Don't tell your wife' before agreeing to 'keep that  one between the two of us' - despite the irony of the public broadcast.

That's gross: The former Spice Girls star said the jellyfish tasted like 'biting into skin'

That was weird: The British adventurer took Mel up on the offer as his hand started to swell

'Mel B, she saved my life,' Bear smiled, insisting: 'It still stings, but it's better'. He then admitted: 'I must say, that is a first. All in the name of survival.' 

'I have no words for it, I have no words for the day,' Mel said later, finally pulling her face in disgust when she had to eat the offending jellyfish, saying it tasted like 'biting into skin.'

Mel's part in the celebrity-based reality show was revealed at the end of August and she confessed that it was not all her idea.

Big ring: Bear was also worried about Mel's huge diamond wedding ring

She's game: Mel was put through several tough challenges

'It was all my daughter Phoenix's idea that I do the show,' she told E! news. 'She convinced me it would be good for me to challenge myself inside and out. 

'Phoenix knows I don't even like going on roller coasters, I'm not an adrenaline rush kind of girl and most things I do I'm totally in control So to do this show was a big leap of faith in my daughter, and of course in Bear! 

'Giving your trust, control and life to someone else is daunting but it was truly a life changing experience. I did things I never thought were possible.'

Others stars who have their own, dedicated episode of the show include Zac Efron, Ben Stiller, Channing Tatum and Today anchor Tamron Hall.

Sheer wall: The singer climbed up a sheer rock face with Bear's help

Predictably, Mel screamed throughout much of the show as she was put through terrifying survival skills, including twice repelling down sheer rock faces that left her repeatedly crying 'Oh my God!' and swimming in the Irish sea after Bear admitted there might be sharks.

'I haven't been abused verbally for a long time,' Bear teased her, before they finished their adventure by swimming out to a jetski that was carried in under a helicopter.

Bear, however, insisted his biggest fear was her destroying her huge diamond wedding ring, saying: 'I just see disaster written all over it, and if she loses that I think the bill's going to get sent to me.'

When she failed to get the ring off, Bear told her: 'Normally the mission is to keep the guest safe. With this one, it's keep the guest safe and also with the million dollar diamond ring still intact.'

Opening up: The singer talked about seeing her mother for the first time in years

Despite her screams, Mel called it an 'exhilarating' experience, adding: 'Words can't even really describe. The best part of this experience is it's real.'

As well as wild adventures, Bear once again managed to get his celebrity guest to really open up to him, with Mel revealing that the previous day she saw her mother for the first time in years while back home in the UK for the show.

'Me and my mom have a difficult relationship,' she told him.

'Moms know how to pinpoint those buttons in their daughters and I just, I'm the kind of girl that's a bit of a fighter. And it was just that one argument that went a little bit too far over the edge. 

Nice fire: Bear and Mel talked around a roaring fire

She cheated: Mel was tasked with starting the fire but she brought a torch to help

That was easy: Bear didn't think Mel could start the fire but she certainly did

'It's a shame really, because if my kids didn't speak to me for years I would be devastated.'

Saying she 'just thought it was the right time' to finally reconnect, she said: 'It was weird seeing her because I haven't seen her for so long. And I used to have a very close relationship with my mom, talked to her every single day

'So it's been a strange one, but it was nice to say hi. I didn't really have very much else to say apart from hi. I just gave her a big hug and we had about three or four hours together, which was lovely.'

She told him that she 'came from nothing,' explaining: 'My mom worked three jobs, my dad worked 12-hour shifts. I'm from a regular, normal, working class background.'

Dinner time: Mel and Bear settled down to eat their jellyfish

As for finding fame, she said: 'I think for my parents it was probably a bit of a relief, ''Oh she's finally off our hands! Go off and do something, do your thing.''

She described the Spice Girls as 'four girls who we all had the same drive, the same passion, the same ambition.'

'We were all kind of rejects. We didn't really get much work individually but together we were so powerful,' she said proudly, adding: 'We had no idea what we would become - we kind of hoped.'

Looking back: Mel reflected on her early days with the Spice Girls while out with Bear

At one point, Bear tried to get her to recall her nerves getting onstage the first time with her band to help her cope with his adventures with her, but she insisted: 'I had four people beside me and I knew what I was getting into and it was exciting. This was not exciting.'

She recalled their early days begging record companies to sign them - including a run-in with Simon Cowell, now her fellow judge on America's Got Talent.

'We ended up in a carpark with Simon Cowell auditioning for him,' she smiled.

Good times: Bear and Mel joked as they settled down to sleep

'He said, ''You girls are great but not for right now.''

'We used to wait outside record companies' front doors and just sing. And then finally Simon Fuller said, ''You know what, you're that persistent I guess I'll give it a go with you, I'll manage you.''

As for judging on America's Got Talent, she admitted it was hard at first 'because I've always been on the other side of it' as the act looking for help.

Hit show: Mel talked about judging entertainers on America's Got Talent

'I learned to like being in that position,' she said. 'It took me a minute to kind of get used to it.'

She also talked about the biggest challenge in raising three daughters being 'balancing being a mom and working and making sure they get enough of your individual time.'

When Bear brought up that all three had different dads, she joked about how proud she was that her first husband was a dancer for the Spice Girls, saying she started the trend.

Family life: Bear asked Mel about raising three daughters

'J-Lo then did it, Britney did it - but I was first,' she laughed.

She also said her time with Eddie Murphy - father to her middle daughter Angel - was an 'interesting relationship to say the least.'

'He's a comedian, a very interesting guy,' she said, adding he was older, too.

Fan favourite: Mel showed her outgoing personality throughout the show

'I didn't really know him as The Eddie Murphy that everyone knows - he was just a nice, interesting guy.'

Bear ended the day clearly impressed with his guest, saying: 'She's had to fight for everything in her life. Really that's where her punchiness comes from.'

Saying she also had 'a big heart and persistence to never to give up,' he added: 'And those are two of the best weapons a girl can have.'

Extraction point: Bear and Mel successfully made it to their extraction point