Una Healy wows in a racy red vinyl dress as she parties at Celebrity Bear Hunt launch after 'shy' star broke out her secret weapon to bond with her co-stars in the Costa Rica jungle

Her new show sees her looking less than glam whilst fending off Bear Grylls in the Costa Rica jungle.

But on Tuesday night Una Healy was dressed to the nines for the launch night of the new Netflix show Celebrity Bear Hunt.

The Saturdays star looked gorgeous in a dark red vinyl dress covered in sparkly detailing for the glitzy premiere in Leicester Square, followed by a wild afterparty at Kettners.

The singer showed off her incredible figure in the skintight number, which featured a racy cut-out on her chest.

She accessorised with a sparkly silver clutch bag and matching heels for the night out with her co-stars including Mel B, Lottie Moss, Laurence Llewelyn-Bowen and Steph McGovern. 

Celebrity Bear Hunt sees a group of unlikely celebrities get dropped into the Central American jungle as prey for one of the world's most fearsome predators – Bear Grylls.

As Bear puts them through their paces, those who fail to impress will face the dreaded 'Bear Hunt'.

The Bear Hunt is a brutal game of cat and mouse where they'll be hunted down by Bear himself and, if captured, face elimination from the show.

Speaking to MailOnline ahead of the premiere Una explained: 'It is very like the Hunger Games, it's like everyone for themselves. There's three elements to it.'

'There's the living together. Then there's the challenges where we're put against each other. You're all in it for yourself. Then at the end, you have to do the Bear Pit and find an exit or evade Bear.'

Una, who has been dubbed 'shy' by her campmates, broke out her singing skills in an effort to bond with her celeb co-stars, with broadcaster Steph McGovern telling MailOnline:  We did karaoke with Una and then everyone in Costa Rica was literally like, “oh my God, she's the best singer in the world. Who is this woman?”

'It was so much fun. I sang Black Velvet. I think I sang Up as well,' Una revealed. 

The stars of the new Netflix series pulled out all the stops as they attended the premiere at the Odeon West End in central London on Tuesday night.

The show's host Holly Willoughby looked as stylish as ever in a gorgeous black plunging gown as she made her arrival to the red carpet along with the celebrities taking part in the show.

The former This Morning star, 43, has returned to screens for the new show after taking a break from TV following her departure from the ITV daytime show.

She was joined by the show's star and survival expert Bear, 50, who looked ready for action in all his gear and later pulled off an abseiling stunt. 

Celebrity Bear Hunt is streaming on Netflix.