diddyredcarpetparty_460.jpgDavid Becker/WireImage

P. Diddy celebrated the holiday weekend with a "Sexiest Party in the City" bash at Chateau Nightclub & Gardens at the Paris Las Vegas. And who decided to show up? Sexy star Chris Brown, of course!

While Diddy was busy promoting his new movie Lawless and pouring lots of Ciroc, Chris joined the original bad boy at his booth and the two "spent most of the evening talking closely and joking around with each other," according to a source inside the club.

Diddy also took time to pay tribute to his former manager, Chris Lightly, who died Aug. 30: "We don’t do moments of silence; we do three seconds of noise." And the crowd went wild.