David Guetta and Sia recently reunited for a new song called "Flames." The duo previously collaborated on the 2011 hit single "Titanium."

The inspirational track still features Guetta's signature club sound. Sia's unique voice perfectly blends with the lyrics of the song. As of late, it is still unclear which album "Flames" will be a part of.

"Titanium" is included in Guetta's Nothing but the Beat. In 2012, Sia and Guetta created the song "She Wolf (Falling to Pieces)." Three years later, they recorded "Bang My Head" together with Fetty Wap.

Who Is David Guetta?

Guetta is a French DJ, songwriter, record producer, and remixer. He co-founded Gum Productions with Jean-Charles Carré and Joachim Garraud. In 2002, the now 50-year-old DJ released his debut album, Just a Little More Love. Two years later, he dropped Guetta Blaster. In 2007, he released Pop Life.

However, it was in 2009 that Guetta achieved mainstream success. At that time, he released the album One Love, which featured the tracks "When Love Takes Over," "Gettin' Over You," "Sexy Bitch," and "Memories."

His 2011 album, Nothing But the Beat, featured the songs "Where Them Girls At," "Little Bad Girl," "Without You," and "Turn Me On."

Guetta also happens to be the first DJ to get into the EDM scene, and he was dubbed as the Grandfather of EDM.

Who Is Sia?

Sia, on the other hand, is an Australian singer-songwriter, record producer, and music video director. She started her career in the music industry in the mid-1990s. Her first album is called Only See, and it was released only in Australia.

In 2000, Sia signed to Sony Music's sub-label, Dance Pool, and released her second studio album, Healing Is Difficult, in 2001. In 2004, she dropped Colour the Small One.

A year later, Sia relocated to the United States where she gained more popularity. In 2008, she released Some People Have Real Problems, and in 2010 she dropped We Are Born. After taking a short hiatus, Sia returned to work in 2014 with her sixth studio album, 1000 Forms of Fear

In 2016, she released This Is Acting. In the same year, she headlined the Nostalgic for the Present Tour. 

Sia's most popular songs include "Chandelier," "Cheap Thrills," "Elastic Heart," "The Greatest," "Never Give Up," "Alive," "Breathe Me," "Bird Set Free," "Unstoppable," "Helium," "Big Girls Cry," "Angel by the Wings," "Move Your Body," "Fire Meet Gasoline," "Soon We'll Be Found," "Clap Your Hands," "Beautiful People," and more.