Katy Perry arrives at the X Factor auditions being held at the Convention Centre in Dublin, Ireland. <br /><br />The 25-year-old singer is a guest judge for the UK talent search show while regular judge Dannii Minogue is on maternity leave. Katy was joined by format creator and judge Simon Cowell at the auditions."X Factor Dublin!" Katy tweeted before the auditions. "Can't wait to spot a star!!!" <br /><br /><img alt="" src="/imagedata/2010/jul/Katy.jpg" border="5" />

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Katy Perry arrives at the X Factor auditions being held at the Convention Centre in Dublin, Ireland

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