Katy Perry's insists on having two rooms of flowers backstage at her shows.

The 29-year-old singer requests a specific arrangement in her favourite colours but the floral display must not include carnations.

According to the star's dressing room rider documents uncovered by The Daily Mirror newspaper, the 'Dark Horse' hitmaker needs two rooms filled with pink, white and purple flowers.

Katy - who also requests her own ''glam room'' when she's on the road - has made it clear there is to be ''absolutely no carnations'' in either room.

The singer's rider list includes organic food, as well as Pinot Grigio white wine.

It has previously been revealed that Katy has someone to wash and chop her fruit and vegetables.

The 'Roar' singer - who is currently on her 'Prismatic' world tour - makes sure the fresh fruit and veg is prepared exactly to her liking.

An insider revealed: ''It's crazy. Katy always seems so down-to-earth when you see her on TV so we didn't expect her to have so many diva demands.

''We've also been told that staff mustn't speak to her, especially to ask for a photo or an autograph, because it angers her before the show.''

Katy requests grapes, apples, pineapple, dried figs, broccoli, celery and peas alongside a selection of tortilla chips at every show.