The X Factor judge says couple are enjoying themselves
The pair have been snapped hugging on several occasions and the 16-year-old broke down in tears on Saturday when Di, 17, was voted off the show.
Although they’ve denied rumours of a romance, Simon, 49, thinks they have feelings for each other.
‘They are just 2 young kids in love,’ he said at The X Factor final press conference.
‘They are young and enjoying themselves. Why not?’
Diana’s student boyfriend Chris Jones is thought to have finished with her because of her friendship with Eoghan.