British R&B; singer Alexandra Burke has split from footballer boyfriend Jermain Defoe on charges of deceiving her again. "Alex is heartbroken but she has ended it. It'sall over. They are not together any more. Alex thought Jermain might be the one but has nowdecided to move on with her life," a source said. Jermain was found two-timing Alexandra andmodel Laura Brown hence leading to the split.