ESSEX icon Gemma Collins will appear on a Channel Four hit show TONIGHT.

The reality TV star will make an appearance on Crystal Maze, in which during a preview of the show, she struggled to get to grips with her teammates instructions.

Collins, after her attempt at the maze said: "Sorry I had a diva moment.

"That was so stressful."

Gemma also seemed to question her team, which included TV legend Carol Vorderman: "You're letting me down, this is not rocket science."

The show will air at 8pm on Friday, June 21.