It's no secret that Chrissy Teigen and John Legend are basically relationship goals and completely dominate the Hollywood couples scene.

So, to put their relationship to the test, the pair took part in the infamous Vanity Fair lie detector test this week to uncover some home truths about each other. As you'd expect, their stint on the popular YouTube series has proved to be somewhat legendary and very funny - reinforcing exactly why so many fans can't get enough of the power couple.

From prenups to who else they find attractive, the couple truly didn't hold back. Keep scrolling to see the highlights from the drama-filled video.

Chrissy Teigen and John Legend are Hollywood's sweethearts.

The pair got together over a decade ago and have gone from strength to strength ever since.

Their romance began in 2007.

via: Getty Images

Teigen and Legend first met on the set of Legend’s 2007 music video for “Stereo," where Teigen starred as the singer's love interest. The model, author, and TV personality later revealed that when the shoot was over, the pair went back to Legend’s hotel room, ate at In-N-Out, and hooked up. “We did the music video, we were together for like 12 hours," she told Wendy Williams in 2014. “We spent the entire day together, me in my underwear and him in a full suit, and I went to go say goodbye to him, to his hotel and we didn’t ever say goodbye that night."

But, the pair didn't make it official until months after their music video fling.

via: Getty Images

With Legend heading out on tour shortly after wrapping up his music video, the timing just wasn't meant to be. “The worst thing you can do is try to lock someone like that down early on, then have them think, ‘There’s so much more out there.’ I played it cool for a long time. Never once did I ask, ‘What are we?’ Marriage was never my goal because I’ve never been very traditional. I was just happy to be with him," Teigen explained to Cosmopolitan in 2014.

While Legend was on the road, the couple talked and texted.

via: Getty Images

But it wasn't long before Teigen joined her beau on tour. Although the pair had a mini-break up during this time... that lasted a day. “I was on tour with him and he’d gotten sick," Teigen revealed to Cosmopolitan. “He was feeling really bummed and stressed out. He was like, ‘I can’t be in a relationship right now.’ That lasted for one day. Literally, a day. I knew it came from a place other than us not working."

After fiery beginnings, the couple settled down with one of many trips to Italy.

The couple took their first trip to Lake Como, Italy - the future site of their wedding and filming location for the music video of the smash hit “All of Me" - in 2007. Apparently, it was on this getaway that Tiegen knew that she wanted to spend the rest of her life with Legend.

After 4 years of dating, Legend got down on one knee.

via: Getty Images

...but it didn't run quite a smoothly as he'd have hoped. Legend proposed to Teigen during a Maldives vacation in December 2011, but the pair had a fight on the way to the airport, and to top it off, TSA almost ruined the surprise before they could even board on their flight.

But luckily, everything turned out fine in the end.

“We get to the Maldives and he had planned this beautiful Christmas. He knows how much I love Christmas…And this waiter comes out with a silver dome for dessert…So he opens up the dome and a ton of arugula falls out and then I kind of fish in it…And I see the little box and then you know, your heart stops and you get so excited," Teigen explained. “There was no big grand speech or anything. I think it was just very lovely and sweet."

The pair got hitched on September 14, 2013, in Lake Como.

But they (legally) got married in an NYC courthouse, a day before traveling to Italy. "We actually got married after going to a couple of Fashion Week shows at Vera Wang, ironically who actually did my dress, but we got married at the courthouse right after," Teigen explained to E! News. “We are dumb and didn’t realize that our Italian wedding would not be recognized unless we had a real ceremony in New York City. So Irina Shayk was our witness—the most beautiful woman on earth!"

The pair have since cemented themselves as a firm Hollywood power couple.

The two are a pivotal part of the celebrity scene and their fans lap it up (especially where Teigen's relatable social media posts are concerned... let's be honest, she's comedy gold.)

The couple share 2 children together.

Teigen gave birth to their daughter, Luna Simone Stephens, on April 14, 2016, and son, Miles Theodore Stephens, on May 16, 2018.

All in all, they are truly relationship goals.

But it looks like the pair want to put their relationship to the test to really see if they deserve their reigning title of a firm Hollywood power couple.

This week, they took part in the infamous Vanity Fair lie detector test.

via: YouTube

The YouTube video, which runs for a whopping twenty-five minutes, sees the couple answer a number of home truths about their relationship while hooked up to a polygraph machine. From prenups to crushes, they well and truly dish the dirt - making for a rather entertaining spectacle.

Teigen was the first to take to the hot seat.

via: YouTube

And Legend certainly didn't hold back - at one point asking if she still found other men attractive.

... and in true Teigen style, she answered brutally honestly.

via: YouTube

In response, Teigen admitted that yes, of course she still finds other guys attractive. Legend then pulled out pictures of celebrities to get his wife’s take on their attractiveness. Love it. 

Legend also quizzed his wife on his music.

via: YouTube

Including if there were any songs she didn't like. The answer? Um, yes! Teigen confessed to disliking "Green Light" - breaking out into a full-blown rant about the track.

When it was Teigen's turn to grill Legend, things well and truly got turned up a notch.

via: YouTube

At one point she candidly asks: "At this moment right now though, are you concerned that we don’t have enough sex?"

And Legend's answer is well, rather TMI, to say the least.

via: YouTube

“No, especially after last night. Wow, TMI, everybody. I’m sorry," the singer joked.

Things took a more serious turn when prenups got a mention...

via: YouTube

Teigen fired the question of whether John would have married her without a prenup. “Um, I think prenups are a good thing to do. I actually wish I knew you were gonna be so successful, I would have rewritten the prenup a little bit. You’re a lot richer than I thought you’d be," the "All of Me" hitmaker said. “If you take one of my monies, I will kill you," Teigen replied.

Teigen fully went in on her beau - grilling him about her weight.

via: YouTube

"Are you waiting on me to lose this baby weight?" Teigen asked. “No, you look perfect," Legend replied. The lie detector test then showed that he was telling the truth.

Check out the full video below.

Pretty much no stone was left unturned. It's not just their marriage that the couple are honest with fans about - the pair, in particular, Chrissy, frequently open up to fans about the realities of parenthood - including the fact that Teigen gets "owned" by her daughter when it comes to meals. Keep scrolling to find out more about their relatable parenting struggle.