Rachel Adedeji fell to the floor in shock when pop diva Whitney Houston turned up to give a surprise X Factor masterclass.
All remaining acts showcased their songs for the star who sang live on the show, with judge Cheryl Cole also performing.
Whitney singled out 17-year-old college student Rachel – who sang Beyonce’s If I Were A Boy – for special praise. She said: “Excellent, wow that’s amazing.”
It seems Rachel already has a celebrity fan, and let’s face it, who better than Whitney Houston?!









