The X Factor has been through all manner of transformations. From one-on-one auditions with Sharon, Simon and Louis to packed venues and 'holistic vocal coaches'.
The latest incarnation was The X Factor: Celebrity, which saw Megan McKenna take the crown in 2019.
In honour of the strangest/greatest talent show on telly, we thought we'd look at all of the winners' singles from the show's fifteen-year history.
We go right back to the FIRST EVER winner of The X Factor, Steve Brookstein, with his cover of 'Against All Odds', up to 2018's Dalton Harris.
Now take a look at all of The X Factor winners' singles from 2004 to 2017:
The X Factor winners' singles
1 of 152004: Steve Brookstein - 'Against All Odds' (Over 25s)
Steve Brookstein's winning single debuted at Number 2 in the UK charts behind Band Aid 20's 'Do They Know It's Christmas', the following week it went to Number 1.
2 of 152005: Shayne Ward - 'That's My Goal' (16–24s)
Shayne Ward was the second winner of the competition and released an original song - whereas most winners released the covers. 'That's My Goal' became the fastest-selling song of 2005!
3 of 152006: Leona Lewis - 'A Moment Like This' (16–24s)
According to reports, 1 million copies of the single were pre-ordered by stores and it was downloaded 50,000 times within 30 minutes of being available online! It reached Number 1 in both the UK singles and download charts.
4 of 152007: Leon Jackson - 'When You Believe' (Boys)
The single was another successful winners' single getting to Number 1 in the UK and becoming a Christmas Number 1.
5 of 152008: Alexandra Burke - 'Hallelujah' (Girls)
Alexandra's 'Hallelujah' became a Christmas Number 1 for the fifth X Factor winner.
6 of 152009: Joe McElderry - 'The Climb' (Boys)
After winning the competition, Joe McElderry's version of 'The Climb' went to Number 1 in the UK. The song was a cover of the Miley Cyrus song which was also released in the same year and featured in Hannah Montana: The Movie.
7 of 152010: Matt Cardle - 'When We Collide' (Boys)
Matt Cardle won the seventh series of The X Factor and released his cover of 'When We Collide' (original title - 'Many of Horror'). The song reached Number 1 in the UK and became the second bestselling single of 2010.
8 of 152011: Little Mix - 'Cannonball' (Groups)
They might be releasing Number 1 songs here, there and everywhere, but back in 2011 Little Mix won The X Factor and released 'Cannonball'. Unlike past winner's singles, the song wasn't released during the week of the popular Christmas Number 1 battle. The song debuted at Number 1 becoming the fastest-selling single of the year.
9 of 152012: James Arthur - 'Impossible' (Boys)
James Arthur's cover of 'Impossible' was released immediately after he won the ninth series of The X Factor. The single became the fastest-selling winning single from The X Factor!
10 of 152013: Sam Bailey - 'Skyscraper' (Over 25s)
'Skyscraper', originally sung by Demi Lovato was released by 2013's X Factor winner, Sam Bailey. The song became a Christmas Number 1 with all proceeds from the single going to Great Ormond Street Hospital and Together for Short Lives.
11 of 152014: Ben Haenow - 'Something I Need' (Over 25s)
Once again The X Factor winner hit the top spot for Christmas in 2014.
12 of 152015: Louisa Johnson - 'Forever Young' (Girls)
Louisa Johnson released her version of 'Forever Young' however, unlike many of the previous winners' singles it didn't make the top spot, only reaching Number 9 in the UK.
13 of 152016: Matt Terry - 'When Christmas Comes Around' (Boys)
Written by none-other than Ed Sheeran and Amy Wadge, 'When Christmas Comes Around' was The X Factor's second ever original song to be released as the winner's single. It debuted at Number 3 in the UK.
14 of 152017: Rak-Su - 'Dimelo' (Groups)
'Dimelo' was yet another original single to be released as an X Factor winners' single. It reached Number 2 in the UK, being kept off the top spot by Ed Sheeran's 'Perfect'.
15 of 152018: Dalton Harris featuring James Arthur - 'The Power of Love'
NOW WATCH: All the winners of The X Factor so far
This year Dalton Harris won the show with his James Arthur duet The Power of Love. Speaking to heat about his reaction to his name being announced, he said: "I blacked out; I’m being honest. I blacked out. Anthony was third and he did his roll thing. I was like ‘cool.’ Then I heard ‘and the winner is…Dalton.’ Then my ears stopped working and [my face] was on fire and I don’t remember anything.
"I remember faces and [I woke up in] Louis’ dressing room. James Arthur gave me this [brooch], then I had to leave to go to the hotel. I went and said ‘thank you,’ then I met my adopted dad and friends that had come. Then I went to bed."
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