The Pillowtalk singer was also billed to pre-record a duet with country star Jennifer Nettles, and fans showed up in droves to see their pop idol - but he wasn't there.

Reports suggest Zayn pulled out of an appearance on Tuesday's (24May16) finale at the last minute.

TV bosses had to scramble over the weekend (21-22May16) after Whitney Houston's family pulled the plug on a planned hologram appearance by the dead star.

The Voice judge Christina Aguilera taped a duet with the eerie moving image of Whitney last week (ends20May16), but the late diva's sister-in-law and former manager Pat Houston revealed the family wasn't happy with the quality of the hologram and scrapped the plans.

Ariana Grande has stepped in to replace Whitney and will appear alongside Christina when the finale airs on Tuesday. It is not clear who will perform with Nettles following Malik's alleged no-show.