Kelly Melissa Sweet (born March 29, 1988),[1][2] known professionally as Haliene (/ˈheɪliən/;[3] stylized all caps),[4][5] is an American singer of electropop and electronic dance music.

She is known for her vocal collaborations with EDM artists Armin van Buuren, Seven Lions, ATB, Ferry Corsten, Aly & Fila, Da Tweekaz, and her song with Gareth Emery and Standerwick, "Saving Light", which won the A State of Trance award for "Tune of the Year".

She began working regularly with a vocal coach and honed her skills as a performer by singing at state fairs, county festivals, and community theatres.

Sweet and her mother eventually went on the road for two years, travelling back and forth between Kanab, Las Vegas and Los Angeles in search of performance opportunities.

After hearing the 14-year-old Sweet's demo CD, the Los Angeles Lakers booked her to sing the National Anthem on three occasions.

"[7] The same year, Sweet opened for Paul Simon on tour in July and October 2006, and her debut album, We Are One, was released by the Razor and Tie label on March 6, 2007.

[10] In January 2014, Sweet self-released a cover of the Phil Collins song "In the Air Tonight", and it was licensed by NBC Television for the promo adverts for their new show called Believe.

[20][21][22][23] In June 2017, she was the only singer to perform two times at the Electric Daisy Carnival with Illenium and Ferry Corsten at the festival which hosted over 400,000 attendees.

[26] Since her debut, Haliene has collaborated with many leading DJs and producers including: ATB,[27] Blasterjaxx,[28] Seven Lions,[29] Illenium, Danny Avila,[30] Slander,[31] Project 46,[32] Aly & Fila, Standerwick,[33] and Ferry Corsten.

[41][42][43][44] The artists partnered with the UK's largest anti-bullying charity Ditch the Label, launching a campaign titled after the song to raise money for the victims of bullying.

[48][49] On May 26, 2017, Haliene released a collaborative science fiction-influenced trance album, Blueprint with Dutch DJ Ferry Corsten on his label Flashover Recordings.

[53][54] On February 2, 2018, she released Deep End, a collaboration with trance producer Standerwick on Armin van Buuren's imprint Armind Records.