Conor McGregor Parties Hard After Beating Nate DIaz in Awesome UFC Fight

Conor McGregor celebrated his win against Nate Diaz in what UFC aficionados are calling a fight for the ages.

Conor cut loose at Intrigue Nightclub in Vegas, after beating Nate by majority decision.

The fight went back and forth all 5 rounds, but Conor eked out the win.

Niall Horan from One Direction -- a fellow Irishman who predicted Conor would win by submission in the 3rd -- showed up for the bash with his GF. Conor's girlfriend, Dee Devlin, was also front and center.