London: Australian pop star Kylie Minogue says she initially "felt guilty" about being more successful than her sister Dannii Minogue, who is also a singer.
Dannii had moderate success before Kylie eclipsed her with her debut album `Kylie` in 1988 which spawned number one single `I Should Be So Lucky`.
The 42-year-old then went on to have 13 successive UK top ten singles, but now says her dominance of the charts made her feel bad for her sister, X Factor`s new magazine reported.
"I would feel quite guilty sometimes although there was no reason to feel that. And I know the last thing she would ever want me to feel is bad."
Dannii`s career as a singer was relatively successful in the early 1990s, with hits such as `Love and Kisses` and `This is It`, but she failed to reach the popularity level of her older sister.
However, the 38-year-old has gone on to have a successful career in television, particularly as a judge on singing contest `The X Factor`, and Kylie said of her sister,
"I always knew her time would come. I`m stoked for her." As well has a television personality and model, Dannii is a fashion designer and recently launched her own range of clothing, entitled, `Project D`.