Just one week after announcing the end of her 4-month engagement to Paris Latsis, Paris Hilton broke her silence only to "Extra." The hotel heiress even dropped a shocking clue as to what might have gone wrong in the relationship.

"Be good to your girl and communicate and tell the truth and don't cheat on her at your bachelor party," Hilton advised our reporter, Carlos Diaz. "It’s gross what guys do on those nights."

Hilton wouldn't say if she was speaking from experience, but she did reveal one way she’s getting over Mr. Paris. "This is a girls’ weekend in Las Vegas," she said.

All eyes were on Paris and her longtime girlfriends Kimberly Stewart and Bijou Phillips at the anniversary bash for the Hard Rock Hotel hot spot Body English. "I’m obsessed with them," Hilton said of her girlfriends. "These are my sisters."

"We've been friends since we were little kids, you know," Phillips added.

Inside, the crowd went wild as Paris partied onstage with Fat Joe, but there were no other boys in sight, and Hilton said that she wouldn’t have this weekend any other way.

"Guys are users," Hilton insisted. "It's better to just have girls you've known your whole life who you can trust, who are not jealous of you like some people."

As for those rumors that Hilton jumped out of the arms of one Greek shipping heir and into the arms of another, the hotel heiress said that despite recent photos, she is not dating Mary-Kate Olsen’s ex-boyfriend Stavros Niarchos.

"I am single," Hilton said. "I love my life."