iiO (pronounced "eye-oh") was a New York City-based dance music act composed of singer-songwriter Nadia Ali and producer Markus Moser. The group gained prominence for its 2001 single "Rapture", which reached number two on the UK Singles Chart and Billboard Hot Dance Club Play chart. Following the success of "Rapture", iiO released several singles and the studio album Poetica in 2005. The album reached number 17 on Billboard's Top Electronic Albums Chart.

The same year, Ali left iiO to pursue a solo career. Meanwhile, Moser continued to release material featuring her on vocals, which included the 2006 single Is It Love? that reached number one on Billboard's Hot Dance Club Play Chart. In 2011, he released the studio album Exit 110, which again featured Ali on vocals and was announced as the final project of the act.

A 17-year old Nadia Ali was working in the New York offices of Versace, when a co-worker introduced her to producer Markus Moser, who was looking for a female singer to collaborate on some of his productions for a girl group. The two teamed up and started a group that was originally named "Vaiio", named after the Sony VAIO laptop Ali used to write lyrics on. They later dropped the "va", on the advice of their label, to avoid causing problems in the future with Sony. Working with Moser, she wrote the lyrics and the vocals for the songs. Their first release was the 2001 single "Rapture", a song Ali wrote in 30 minutes based on a relationship with an Australian man she met in a nightclub. The song was a hit charting at number 2 in the UK Singles Chart and Billboard's Hot Dance Club Play Chart. The song was remixed by prominent DJs and producers including Paul Van Dyk, John Creamer & Stephane K, Armin Van Buuren and Deep Dish.

Armin van Buuren (Dutch pronunciation: [ˈɑr.mɪn vɑn ˈby.rə(n)]), OON (born 25 December 1976 in Leiden, Netherlands) is a Dutch trance producer and DJ. Between 2007 and 2010, he was voted number one in DJ Magazine's annual top 100 list of the most popular DJs. In the 2011 list, he ranked in second place. Since 2001, Van Buuren has hosted a weekly radio show called A State of Trance, which claims to have around 15 million weekly listeners in 26 countries, which would make it one of the most listened-to radio shows in the world. His 2008 studio album, Imagine, entered the Dutch album chart at #1, a first for a dance music artist in Dutch music history.

Armin van Buuren was born in Leiden, Netherlands on 25 December 1976, but grew up in Koudekerk aan den Rijn. Van Buuren started making music when he was 14.^{[citation needed]} He was inspired by French electronic music composer, Jean Michel Jarre, and wished to become a great electronic music composer like Jarre.^{[citation needed]}

He finished high school at the Stedelijk Gymnasium Leiden in 1995, and left for college to study law at Leiden University. While studying law, Van Buuren's interest for making music blossomed, and he began working as a DJ in a local club called Nexus. As his musical career began to take off, he put his law degree on hold, although he did return to finish law school in 2003.

Nadia Ali (Urdu: نادیہ علی; born August 3, 1980) is a Pakistani American singer-songwriter, born in Libya and raised in Queens, New York. She gained attention as the frontwoman and songwriter of the band iiO, after their 2001 hit "Rapture" reached No. 2 on the UK Singles Chart. The song also charted across several countries in Europe. Their 2006 single, "Is It Love?", reached the top of the Billboard Hot Dance Club Play Chart.

After embarking on a solo career in 2005, Ali became successful as an oft-requested vocalist in electronic dance music. She released her debut album Embers in 2009. Critics praised her unique songwriting, which combined electronica with ballads, Eastern and acoustic music. Three singles from the album reached the top-ten of the Billboard Hot Dance Club Play Chart, including the No. 1 hit, "Love Story". The song was also nominated at the 25th International Dance Music Awards at the Winter Music Conference, while "Fantasy" was nominated for a Grammy award.

In 2010, she released a remix compilation titled Queen of Clubs Trilogy to mark her decade-long career as a singer-songwriter. "Rapture" was re-released as the only single from the compilation and the song was once again a chart success in Europe. Ali released the single "Pressure" with Starkillers and Alex Kenji in 2011, which became a club and festival anthem and received an International Dance Music Award. She has also collaborated with several notable producers and DJs, such as Armin van Buuren, Schiller, BT and John Creamer & Stephane K. Ali is currently working on her second studio album titled Phoenix, which is due to be released in 2012.