Britney's birthday may have been the weekend's big event at Hyde, but she was hardly the only celebrity present at Los Angeles' hottest club! Paris Hilton, for instance, made sure to stop by - and she brought her newest blonde pop-star friend Fergie along for the ride! (Apparently Fergie couldn't keep up with Paris' partying ways, though - by the time 2 AM rolled around, Fergie had already left by herself, while Paris was still inside singing karaoke to Rod Stewart's "Do You Think I'm Sexy"!) We also noticed Paris' sister Nicky leaving with a new man - could she be trying to send a message to Kevin Connolly? But by far, the funniest moment of the night came when we caught (and we do mean caught) Brett Ratner checking out some hot young starlet - keep your ears peeled for his response when the hostess tells the director that she's got a boyfriend!