"In and Out of Love" is a collaboration between Dutch DJ and record producer Armin van Buuren and Dutch singer and songwriter Sharon den Adel from the band Within Temptation. It was released on 6 August 2008 as the second single from van Buuren's third studio album, Imagine.
The single has been performed live by Sharon and Armin during the Armin Only: Imagine shows. As of September 7, 2024, the single has more than 335 million views for its official music video on YouTube, making it the second most viewed video on Armada Music's YouTube channel.
In January 2016, the song was sampled on British rapper Dave's single, "JKYL+HYD". Later, on June 28th 2024, Russian musician Lonown sampled the track as part of the song "Avangard", which became a viral hit.
In 2019, the song was covered by Visions of Atlantis on the album, Wanderers.