

Subsequent singles " Trouble" featuring American rapper Childish Gambino and " Lovebird" were less successful, the former reaching the top ten in the UK and top thirty in Ireland, while the latter sold fewer than 600 copies in the UK and failed to chart anywhere in Europe. The Afrojack remix of "Collide" is the only version to feature on Glassheart. Through mutual agreement it was released as a collaboration, becoming a top-five hit in the UK and Lewis' first to top the US Billboard Hot Dance Club Songs chart. Originally a song by just Lewis, Avicii sued Sony Music claiming that the song plagiarised his own instrumental " Penguin". " Collide", a collaboration with house music DJ Avicii, was released on 2 September 2011.

Producer Fraser T Smith executive produced the album after impressing Lewis with his work on Hurt: The EP (2011), a cover song extended play (EP) that Lewis released to bridge the gap between Echo (2009) and Glassheart. On Glassheart, Lewis reunites with Ryan Tedder, record producer of her previous singles " Bleeding Love" and " Happy" and songwriter Andrea Martin who co-wrote " Better in Time", in addition to a number of new collaborators such as British duo Naughty Boy and Emeli Sandé, Rodney "Darkchild" Jerkins and DJ Frank E. The album was the first – and so far only – of Lewis' albums not released in North America. Recording and production took place in Denver, Los Angeles and London originally the album was due for release in November 2011 but was pushed back several times to accommodate new recording sessions and allow more creative time. Glassheart was conceived in 2010 shortly after the completion of Lewis' first headline tour, The Labyrinth. The album is Lewis' first under RCA Records after parent company Sony Music Entertainment closed J Records and relocated its artists. Glassheart is the third studio album by English singer Leona Lewis, released on 12 October 2012 by Syco Music and RCA Records.
