Romanian band Radio Killer turn a tune about longing for an ex into a party anthem on the new song 'Lonely Heart.'

The track begins with a gentle piano intro and a female voice singing, "The memory of you still lingers on / And our song is playing in my head on and on / My world's black and white, baby, now that you're gone."

Suddenly, synthesizers kick in and the song becomes a full-on trance assault.

Despite regretful lyrics about falling asleep every night while dreaming of an ex-lover, the song's infectious melody and "I'm a lo-lo-lonely heart" hook make it an ideal song to light up the dance floor.

Radio Killer emerged in 2009 with a "Who is Radio Killer?" campaign that revealed the seven band members one by one. The group scored hit singles 'Voila' and 'Be Free' throughout Europe before releasing 'Lonely Heart.'

The official video for 'Lonely Heart,' depicting a raucous dance party, has earned more than 700,000 views on YouTube.

Listen to Radio Killer, 'Lonely Heart'

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