Songfacts®:

• This motivational pop tune is a collaboration between David Guetta and Sia. It marks the fourth time the duo have worked together on a Guetta track, following "Titanium," "She Wolf (Falling to Pieces)," "The Whisperer" and the Fetty Wap-assisted "Bang My Head."
  
  The pair also collaborated on "Wild One Two," a remix of Flo Rida's hit single, "Wild Ones" and a revamp of Sia's Fifty Shades Darker song "Helium."
  
  "'Titanium' is still one of the tracks I am proudest of and Sia is one of my favorite artists to work with," said Guetta. "She's a great songwriter and has an amazing voice. I'm just super excited that we get to release another track together."
• "Flames" is an inspirational anthem that finds Sia singing about overcoming struggles.
  
  So my love, keep on running
  You gotta get through today
  There my love, keep on running
  Gotta keep those tears at bay
  Oh, my love, don't stop burning
  Gonna send them up in flames
  In flames
  
  Sia is offering words of encouragement to a loved one who is going through a rough time.
• While "Flames" doesn't have a huge chorus like Guetta's previous collaboration with Sia, "Titanium," he still finds the song very interesting: He told Billboard: "It's so vibey, and the beat is really funky, and I like it a lot."
• In 2018 this was the most-played song of the year on European radio.