They are very open about their relationship often participating in public displays of affection towards one another.
But perhaps Chrissy Teigen shared a little too much about their sex lives as her honest answer about getting intimate at an Obama event left John Legend almost speechless.
The power couple chatted with AJ Calloway and Tracey Edmonds from the programme Extra when the 29-year-old model picked a question out of a mystery bowl.
Chrissy read the question on the Grammy Awards red carpet as she said: 'Public place you did it. Is this the best or the worst?'
John, 36, seemingly sweating the answer already wiped off his forehead as he said: 'The best.'
The former Sports Illustrated cover girl then continued: 'Okay the best, um, probably the Obama thing,' as she begins laughing and walks off camera.
Speechless: The 36-year-old crooner cringed as Chrissy revealed the answer then walked off camera as he said: 'We're not going to discuss that. We're not talking about it, that's the truth'
The All Of Me singer looked none-too-pleased with the answer given by his wife of nearly 17 months as he was queried what she was talking about.
He said: 'I don't know. We're not going to discuss that. We're not talking about it, that's the truth.'
Chrissy returned for a bit of damage control as she assured the interviewers: 'Not the White House. 100% not the White House.'
Damage control: The couple made sure that the interviewers knew that the sex at the Obama event did not happen at the White House as he was yet to be elected
John reiterated: 'It was not at the White House. That's correct. He was not elected yet.'
The American model tried to get back in the good graces of her crooner husband as she said: 'Sorry, I'm in trouble now.'
Aside from the awkwardness, the couple looked very stylish as they attended music's biggest night together.
Chrissy showed off her model frame in a long-sleeved, figure-hugging gown which featured a line of cut outs around her bust into her torso and down the side of her legs.
Chic: The couple made a fashionable arrival at the event held at The Staples Center in Los Angeles as John looked dapper in a grey suit featuring a black lapel and black leather dress shoes
Wonder in white: Chissy showed off her svelte model figure in a clinging white gown which featured a line of cut-outs from her neck all the way down her legs
She completed the look with a matching white clutch as she wore her dirty blonde locks down into waves flowing over her shoulders and had natural, complimentary make-up on her face.
As usual the Ordinary People hitmaker looked dapper as he donned a grey suit featuring a black lapel over a smart white shirt and black leather dress shoes.
John closed out the show alongside rapper Common as part of the tribute to civil rights leader Dr. Martin Luther King's epic march from Selma to Montgomery, Alabama.
Dynamic duo: John teamed up with rapper Common to close out the Grammy Awards with a touching tribute to Dr. Martin Luther King's historic march from Selma to Montgomery, Alabama
Historic: The Ordinary People singer did what he does best as he sung the track Glory while behind the piano
Closing it out: The duo were led in by Beyonce who sung the hymn Take My Hand Precious Lord before saying: 'Reminding us once more of the glory of music, ladies and gentlemen John Legend and Common'