The singer ran into trouble with another partygoer as he left the Three Six Zero and Roc Nation Brit Awards after party at Hakkasan in London.
He looked to get into an argument with the unknown guest and had to be pulled away from the confrontation by bandmate JB Gill.
He was then led away by a member of the band's security team as they headed off into the night.
The boys had earlier been on the red carpet of the Brits and also made an appearance at Justin Timberlake's secret gig before they hit the parties.
The lads admitted it look them three hours to get ready for the big night as they debuted a new gentlemanly look.
Watch the video of JLS on the red carpet above.