The 'Lose Yourself' hitmaker was headlining a gig in Ireland, but the show was marred when 22 fans were taken into custody for being drunk, threatening or abusive in a public place, reported Contactmusic.
While 35 other fans were detained for minor drug offences.
"The vast majority of fans heeded the advice given in advance of the event which ensured everyone had a safe and enjoyable experience," said Police superintendent Michael Devine.