Songfacts®:

• "X" is a Latin-pop crossover in which the Jonas Brothers collaborate with Colombian reggaeton singer Karol G. The sultry dance number finds the sibling trio flirting with a girl on the dance floor.
  
  Watchin' her move, I was lost in the rhythms
  Then she pulled me close by the look in her eyes
  Don't know her name, but I know that I need her
  She said, "Boy, you won't be lonely tonight"
  
  Karol G brings a fiery Spanish verse in the song's back half. She is feeling hot and wants to dance all night, soft and wild like an animal.
• This marks the second time the Jonas Brothers have teamed up with a Latin act, following their 2019 single "Runaway" with Colombian singer Sebastián Yatra, Puerto Rican artist Daddy Yankee, and Dominican songstress Natti Natasha.
• The Jonas Brothers and Karol G wrote the song with:
  
  US songwriter Ali Tamposi (Camilla Cabello's "Havana," Dua Lipa's "Break My Heart").
  
  Swedish producer Shellback, who previously collaborated with The Jonas Brothers on their "Only Human" single.
• The sibling trio featured the song in their tour documentary, Happiness Continues: A Jonas Brothers Concert Film, which premiered a month before the song's release.
• The video, shot during the coronavirus lockdown, shows the sibling trio and Karol G performing the song on individual, rotating smartphone screens against a white background.