Sugababe Amelle Berrabah's boyfriend was jailed overnight on Christmas Eve after a fight in a club.
Freddy Fuller, 24, was arrested after a club brawl ensued when a clubber pinched his famous girlfriend's bum.
A source told The Sun, "Amelle jumped up startled and tried to brush this guy's hand away after he pinched and stroked her backside.
"Freddy hit the roof and all hell broke loose. He and a mate got caught up in the fighting when the guy's mates turned up. Freddy and his mate were coming off worse and their pals were summoned on mobiles. It quickly turned into a riot.
"The doormen intervened but were outnumbered and one had his finger almost chewed off. He had to have micro-surgery on it."
Despite the fighting, Amelle said of her boyfriend: "He does have a history for being a bit of a hardman but I've calmed him down now. He's always treated me like a princess."