X Factor contestant, Alexandra Burke has been having intensive vocal training this week with Yvie Burnett.

Alex has had problems with her throat, caused by her singing technique since early in the competition. This week she has finally had a break through at the coaching sessions learning to sing from her stomach on not from her throat.

Yvie is convinced that the new technique she’s learnt will have dramatic effects on Alexandra’s performance.

However, after Simon comparing her to Whitney in the past, Alexandra is having concerns that singing such a huge Mariah Carey hit will bring “karaoke” comparisons from Cowell.