Kylie Minogue says her bum is its ''own entity''.

The 'Can't Get You Out Of My Head' singer has opened up about her famous rear end and said it is ''holding up well'', joking she should send her own fan mail to it.

She told The Sun newspaper's TV Magazine: ''The bottom is doing very nicely, thank you - it's holding up well.

''I think of it as something entirely separate from me. The bottom is its own entity.

''It even has its own Twitter profile. I should write letters to it!''

The star - who previously appeared as Charlene Robinson in Australian soap 'Neighbours' - insisted she has still had to learn to be ''tough'' in the entertainment industry.

She explained: ''You have to be tough in this business. I mean, I don't really think of myself as being like that but it's definitely there. I wasn't cast as Charlene the mechanic in 'Neighbours' for nothing.

''You have to have something inside you that will bounce you back from any knock, will keep you going, pushing you on. So I'm tougher than I look.''