Spencer Pratt thumped his sister's ex-boyfriend Saturday night at Coco de Ville nightclub in Hollywood. After months of ights and makeup cuddles, Stephanie was dumped by her boyfriend, Cameron Huston, an aspiring actor who appeared briefly on The Hills. On Jan 17 Spencer saw Cameron and supposedly started a heated argument. After 10 minutes of shouting, an eyewitness says Spencer lost it and smashed his sister's ex in the face!

"Cameron had to be taken to a local hospital," a witness tells Star. "There was blood; there was screaming. It was a major scene." Cica Huston tells Star exclusively, "Spencer's attack was completely unprovoked," Cameron was recuperating at home. Nevertheless the entire episode must not be shocking for readers as this sort of thing happen to most of the cast of The Hills once a month, isn't it? Spencer Pratt and Heidi Montag where seen at Millions of Milkshakes in Hollywood, they are one couple who loves to put on a show for a cameras, just take a look....

(Source: starmagazine.com)