Robbie Williams horrified Anna Kendricks while appearing on The Graham Norton Show together.
Williams, who was promoting his new single Party like a Russian, was asked to answer the 'maddest thing' a fan has given him.
'I'll get in a lot of trouble for telling this story,' Williams began.
The popstar was renting a castle while on tour when he was awoken by a stranger in his room.
‘I could swear that they were tidying up or cleaning or something,' he said. 'Sure enough, I open my eyes and there was a lady at the bottom of the bed. She could have been anywhere from 28 to 58. She's got this headset on, it's got this tape on it and the lead went down to cassette player.
‘We were well into the days of CDs at this time and I was like, "Wow." But you just woke up so you don't really know what's going on. She looks at me. I look at her. I went, "Alright?" She went, "Alright?" She looked on the floor where my underpants were, and she went, "Calvin Kleins? P***y!"
'I'm like, okay, this is definitely really weird. She went, "Have you got morning glory?" This is back in the day when I used to have morning glory! So I was like, 'Yeah!' She says, "I'll w*** you off!" I'm really young and creative and I can close my eyes and pretend it's somebody else, so it's like, "Yeah, go on then!"
'Anyway, she does the dirty deed and it's confusing. I felt defiled. Off she went on her merry way! That night I was with the lady who ran the castle. I said, "Your cleaner's weird!"
'She said, "We don't have cleaners on a Wednesday." It was just somebody who had walked in off the street come up and give me a h*** j**, and then left!'