“What happens when the hourglass of love runs out/ Under one roof of one house/ And everything becomes so cold?” asks Tinie Tempah on “Love Suicide,” his emotionally-charged duet with Ester Dean off his U.S. debut Disc-Overy (May 17). The British lyricist opens up about a failed relationship over a guitar-laced melody from Stargate, while a fragile Dean expresses her pain, singing, “I’m all out of tears/ Tell me get out of here/ You made it very clear/ You did it on purpose.”