Yung Berg -- the guy who rapped on the song "Sexy Can I" -- was violently beaten and robbed at a house in Los Angeles this weekend ... TMZ has learned.
According to law enforcement sources, Berg -- real name Christian Ward -- was at a house party at around 2:00 AM Monday morning when four suspects entered the home and brandished firearms.
We're told the suspects pistol-whipped two people inside the party -- one of whom was Berg. Law enforcement sources say the suspects robbed eight people and made off with $10,000 in cash and jewelry.
A rep for Yung Berg said his client "has been in Vegas." When asked if Yung was in L.A. over the weekend -- the rep said he doesn't know anything about the incident.
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