London-based singer Taio Cruz's first single, "Break Your Heart," debuted at No. 1 on the U.K. singles chart without any gimmicks. His stateside version turns up the heat with a feature by Ludacris, who gives an upfront warning to women in his brief rap introduction. Cruz's breezy vocals on this electro-pop number have all the warmth of smooth R&B, while producer Fraser T. Smith sets up the right ratio of catchy vocals and tempo changes to make a hit in the vein of Jay Sean's "Down." "Break Your Heart" recently debuted stateside on Billboard's Top 40 Rhythm Airplay chart, and Cruz's album, "Rokstarr," will be released later this year. Between producing and writing for Sugababes and Justin Timberlake and burning up the dancefloors, Cruz is on track for a big 2010.