She’s been delighting her fans with her outfit choices during her Tell Me That You Love Me tour.

And Demi Lovato appeared to put on one of her most provocative shows yet when she performed at London’s o2 arena on Monday night.

Wearing underwear, fishnets and sexy thigh-high boots, she sat sexily on a sofa as she sang to her adoring fans, before gyrating over a chair.

All about the music: Demi Lovato wore skimpy underwear and thigh-high boots as her VERY provocative tour hit London’s o2 arena on Monday night

She had several outfits several times, wearing a sheer robe as she cavorted with her backing dancers while on stage.

Another ensemble saw her wearing a white lingerie set as she played a red electric guitar while perched on a bed.

The night before, Demi sang her confessional new song Sober for the first time since revealing she had relapsed after six years of sobriety.

Doing her thing: She had several outfits several times, wearing a sheer robe as she cavorted with her backing dancers while on stage

She performed the song at the Rock in Rio Lisboa Festival in Portugal, where the crowd roared with adoration as she kicked off the song.

But as the tune went on, Demi appeared to be fighting back tears.

Afterwards, Demi tweeted a video of the performance with the caption, ‘Tonight I took the stage, a new person with a new life. Thank you to everyone who has supported me throughout this journey. It will never be forgotten.’

Emotional: Demi fought back tears as she sang her new song Sober in Portugal on Sunday after admitting she had had a relapse

Adoring fans: No doubt her audience were thrilled to see her in action

Giving thanks: Demi tweeted a video of the performance with the caption, ‘Tonight I took the stage, a new person with a new life. Thank you to everyone who has supported me throughout this journey. It will never be forgotten’

The emotional moment on stage came as Demi sang the lyrics: ‘And I’m sorry for the fans I lost. Who watched me fall again. I want to be a role model, but I’m only human.’

‘Momma, I’m so sorry. I’m not sober anymore,’ she sings in the chorus. ‘And daddy, please forgive me for the drinks spilled on the floor.’

When the song ended the crowd chanted, ‘We love you, we love you.’

Lullaby: Another ensemble saw her wearing a white lingerie set as she played a red electric guitar while perched on a bed

Body confidence: She showed off her curves in all her glory as she performed to the crowd

The pop star, who has been about her struggles with addiction, mental illness and disordered eating, celebrated six years sober March 15.

She shared the raw details of her alcohol and drug abuse back in October when YouTube released her documentary Simply Complicated.

‘My dad was an addict and an alcoholic,’ she explained. ‘Guess I always searched for what he found in drugs and alcohol because it fulfilled him and he chose that over a family.’

Demi checked into rehab for the first time in 2010. She returned to a sober facility three years later for additional therapy.

‘I got no excuses,’ she says in her latest single. ‘I wanna be a role model, but I’m only human.’

After Monday’s show in London, Demi’s Tell Me You Love Me world tour heads to Italy for a show on Wednesday at the Bologna Unipol Arena.

On the road: The songstress is currently on her Tell Me You Love Me world tour

European leg:  The Tell Me You Love Me world tour heads to Bologna, Italy Wednesday