In-trend 'circus' theme irks Pink

Pink regrets staging a circus-themed show for her ongoing world tour - because she's been plagued by comparisons to Britney Spears.

The 'So What 'hitmaker is taking her 'Funhouse' world tour Stateside this summer and has been bombarded by critics accusing her of copying Spears - who launched her own 'Circus' tour in the US in March.