"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.[3] 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.[4][5] In January 2016, the song was sampled on British rapper Dave's single, "JKYL+HYD".[6] Later, on June 28th 2024, Russian musician Lonown sampled the track as part of the song "Avangard", which became a viral hit.[7] In 2019, the song was covered by Visions of Atlantis on the album, Wanderers.[8]