Whitney Houston was reportedly upset after Simon Cowell gave one of her new tracks to Danyl Johnson, for last week’s X Factor.

The singer was saving ‘I Didn’t Know My Own Strength’ for her upcoming comeback tour, but Simon assigned it to teacher, Danyl.

Simon is said to have won Whitney over, by ordering her a basket of toiletries and pamper products from brand Jo Malone.

A source told The Mirror newspaper: “You’d never guess that anyone could leave Simon speechless – he usually has contestants quivering in their boots. But he has got a taste of his own medicine with Whitney.

“They had a lot of playful chemistry and got on like a house on fire.”