Mike "The Situation" Sorrentino was arrested on Tuesday.
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The 31-year-old former "Jersey Shore" star was taken into custody after he was involved in a "fist fight" inside his New Jersey tanning salon.
Sources tell TMZ the brawl was between Mike and his brother Frank.
The reality star posted $500 bail and is expected to be released later in the day.
Mike and his family own the tanning salon where the fight took place.
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The business has struggled to take off, and four salon employees recently filed a police report in order to get paid.
Reportedly, the paychecks the Sorrentinos gave them bounced, and each person was owed $100 to $200.
Mike is said to have attributed the problem as "an innocent mix-up" when "the store changed payroll companies."