The 'Not Fair' singer met the former 'Dynasty' star at a London party and went to give her a friendly greeting kiss on 30 April.

However, Joan - famed for her outspoken remarks - seemingly refused the offer, claiming she didn't exchange kisses with strangers.

Speaking about the meeting at the bash to celebrate 100 years of London store Selfridges, Lily wrote on her Twitter webpage: "I was just introduced to Joan Collins, shook her hand and went to kiss her on the cheek. 'I don't kiss people I don't know.' AMAZING!"

This is not the first time Lily has been snubbed by another celebrity.

Last year, Lily revealed she was desperate to record a duet with Take That but was turned down by their management.

Talking about a song on her new album, which was inspired by the reformed British boy band, the star revealed: "I asked them to sing on it and they were like, 'Yes!' Then Elton John called them.

"He spoke to Gary Barlow and asked him to do it. But the manager said no."