Robbie Williams made a big mistake while tattooing Louis Tomlinson's arm recently.
The pair work alongside each other as judges on this year's X Factor.
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The messers decided to give each other a tattoo but it all went south when the One Direction star moved slightly.
This caused Williams' hand to slip and draw a mark that he never intended on creating.
Williams looked to the tattoo artist for help, ''Do you wanna fix that?''
Tomlinson replied, "No, no. You fix it lad. Go on, I believe in ya.''
