Simon Cowell has said he is “truly devastated” and “heartbroken” over the death of former One Direction star Liam Payne.

The X Factor judge – who mentored the band on the show and later signed them to his label – posted a tribute on Instagram to the 31-year-old singer.

Payne died on Wednesday after falling from a hotel balcony in Argentina.

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“You never really know how you feel about someone until a moment…