'Marry me Jessie J!' One Direction's Niall Horan declares his love after singer wows in skimpy bejewelled costume on X Factor

Niall Horan broke the hearts of fans all over the world when he proposed to popstar Jessie J on Sunday night. 

But before One Direction followers get hysterical, it was simply a joking offer after he became mesmerised with Jessie's sexy outfit as she performed on X Factor. 

Like any red-blooded male, Niall couldn't help but be overcome and he quickly took to Twitter to share his admiration, writing: '@JessieJ marry me!'

Future Mrs Horan? Niall Horan tweeted a proposal to Jessie J after she wowed on X Factor with her sexy outfit on Sunday night 

Future Mrs Horan? Niall Horan tweeted a proposal to Jessie J after she wowed on X Factor with her sexy outfit on Sunday night 

Sexy singer: Jessie J storms the X Factor stage in leather boots and a sheer catsuit with just her high waisted knickers underneath
Pop's new it couple? Niall Horan was overcome after Jessie J performed on the X Factor and took to Twitter with a joke proposal 

Pop's new it couple? Niall Horan was overcome after Jessie J performed on the X Factor and took to Twitter with a joke proposal 

The feisty pop star certainly made an impact by slipping into a skimpy black costume, which featured a black bra and hotpants underneath a bejewlled body costume. 

Her look was completed by a pair of thigh-high boots.

While there are few who would turn down such an offer from the Irishman, Jessie has yet to respond. 

Meanwhile, just last week she revealed she had turned down a lucrative offer to be a judge on The X Factor over bullying concerns.

However, she appeared to forget her criticisms when she appeared on the show on Sunday night. 

Passion: Jessie gave her all on the X Factor after saying she had turned down the opportunity to judge

Passion: Jessie gave her all on the X Factor after saying she had turned down the opportunity to judge

The Price Tag hitmaker took to the stage on the ITV juggernaut to promote her latest track Bang Bang during the elimination show. 

Owning the stage during her explosive set, she got both the judges and the audience on their feet.

Speaking to host Dermot O'Leary after her performance, Jessie revealed she was a big fan of contestant Fleur East, who won a place in her mentor Simon Cowell's final three after wowing him and his pal Sinitta with her own rendition of Bang Bang during the Judges' Houses stage of the competition.

Jessie said: 'Can I just say, [Fleur's] rap part was amazing - she's wicked. 

'Someone who can sing all three parts [of the song] is amazing.'

Her appearance on the show is a major turnaround for the singer, who insisted she opted to appear on X Factor's biggest rival The Voice as a coach for two years because she didn't want to 'bully' wannabes during the audition process.

She told The Sun: 'I think the show’s been a major success and loads of amazing acts have come out of it but I can’t handle the whole taking the p*** out of people. 

Owning it: The brunette was performing to push her new single Bang, Bang
Critique: Jessie said she loved Fleur's rap on her Saturday night performance

Declined: The singer revealed that she had been asked to take up one of the spots on the panel but turned it down

'I can’t sit and watch them putting people through for TV amusement and I said that to Simon’s face when I sat with him.

'I said, "I appreciate you as a businessman but I’m not a bully - and it’s bullying".' 

Meanwhile, another The Voice mentor took to the stage on Sunday - Adam Levine, who appears on the US version of the talent show, played with his band Maroon 5. 

The group sang their new track Animals in front of an impressive green light display.

Giving it some welly: Jessie revealed her incredible physique as she put her all into the performance on Sunday

Giving it some welly: Jessie revealed her incredible physique as she put her all into the performance on Sunday

Moving on: The Pricetag singer has been focussing on her singing career again after leaving singing show The Voice

Moving on: The Pricetag singer has been focussing on her singing career again after leaving singing show The Voice

Unique: While Jessie's presence on The Voice, she has had two successors since in Kylie Minogue and Rita Ora, who was recently announced as the fourth in the all male line-up

Unique: While Jessie's presence on The Voice, she has had two successors since in Kylie Minogue and Rita Ora, who was recently announced as the fourth in the all male line-up

The comments below have not been moderated.

The views expressed in the contents above are those of our users and do not necessarily reflect the views of MailOnline.

By posting your comment you agree to our house rules.

Who is this week's top commenter? Find out now