She has had issues with body image in the past, contributing to her stint in a treatment centre last year.

But there was no doubt that Demi Lovato was well and truly confident in her skin tonight, as she stepped onto the red-carpet at the 12th annual Latin GRAMMY Awards at the Mandalay Bay Resort & Casino in Las Vegas.

In fact, the Disney star stole the show, in her very plunging plum gown.

Mind the gap! Demi Lovato was well and truly confident in her skin tonight, as she stepped onto the red-carpet at the Latin Grammy Awards in a plunging plum gown

Standing out: All eyes were on the teenager, whose deep V-gap at the front of the frock showed off acres of  chest and décolletage

All eyes were on the teenager, whose deep V-gap at the front of the frock showed off acres of  chest and decolletage.

The stunning singer and actress let the daring dress do all the talking by simply pairing the look with a moonstone cocktail ring and some chandelier earrings.

She also had toned down her recently dyed bright red hair to a more classic richer chestnut hue.

Simple accessorising: The stunning singer and actress let the daring dress do all the talking by simply pairing the look with a moonstone cocktail ring and some chandelier earrings

Pretty locks: She also had toned down her recently dyed bright red hair to a more classic richer chestnut hue

As time passes Demi has been changing herself inside and out one step at a time.

A year has passed since admitting herself to rehab – and recently she opened up to Latina Magazine about her life-changing decision:

‘I thought I was going to lose everything when I checked myself into treatment. … I didn’t know if I would have a career at all when I came home,’ she said.

On again: Demi’s on/off boyfriend Wilmer Valderrama was also present at the awards night tonight, looking handsome in a black tuxedo jacket that he wore with an open neck shirt, which matched Demi’s dress

From plum to purple: Demi took to the stage in a grape coloured dress to perform with Pablo Alboran

‘I can honestly say I’m glad I hit rock bottom when I did. … I see a lot of young people in this industry who feel entitled because they haven’t hit rock bottom yet. I feel blessed when I get an opportunity now.’

But this wasn’t the singer’s idea from the get-go. She went on to explain: ‘It was influenced by management, publicists and family.

‘But they were all bringing up a good point: What teens need most is someone they can relate to — someone they connect with on serious subjects like eating disorders, cutting, bipolar disorder, depression and bullying…

Dazzling: Sophia Vergara showing off her curves in a silver strapless gown

Flawless: The dress clung to the actress’s curves in all the right places

‘Why wouldn’t I be honest about it so I could  help someone else?’

And lately it looks like Demi’s love live is also going great.

Last month, the Skyscraper singer was caught in a serious smooch session with her 31-year-old ex-beau and That 70’s star Wilmer Valderrama outside of his Los Angeles home.

He was also present at the awards night tonight looking handsome in a black tuxedo jacket that he wore with an open neck shirt, which matched Demi’s dress.

After spending two months in the treatment facility for ’emotional and physical issues,’ Demi reportedly reunited with the actor in late January.

Golden girl: Singer Shakira also went for a strapless number, but instead opted for a gold hue