Chris Massey has been arrested for domestic violence ... TMZ has learned.
The "Zoey 101" star was in Vegas over the weekend and got into an argument early Sunday with reality star GF Cassalei Jackson at Marquee Club at Cosmo. Law enforcement tells us Massey allegedly pushed her to the ground.
Massey was detained by security until cops arrived. He was arrested and booked for misdemeanor domestic violence.
BTW ... Jackson is the daughter of Shar Jackson, who has 2 kids with Kevin Federline. K-fed is not Cassalei's dad. Cassalei and Shar are featured on this season of "The Mother/Daughter Experiment: Celebrity Edition."
Massey was on the receiving end of a beatdown last year, when Lil Twist and others allegedly broke into Kyle Massey's house and attacked Chris.
As for the Vegas case, Massey has been released on bail.
2:15 PM PST -- Massey's telling friends he was indeed in an argument with Cassalei. He says when they were leaving the club she accidentally fell and security jumped to the conclusion he pushed her because they overhead their loud argument. We're told she's not pressing charges.