Diddy and Sienna, whether they're just good friends or more than that, were seen partying it up at DC-10 Club on Ibiza. The duo both look pretty tired after a long night out, opting for sunglasses to protect them from the unforgiving flashbulbs.The longer that rumors follow around Sienna and the Diddy the more I vaguely believe that there's a little something between them. Who knows, though, especially considering there were silly rumors about the hip hop mogul's involvement with Penelope Cruz just last week. Sienna still feels a little over exposed these days, but some people obviously still appreciate the fashionista -- she landed the coveted September cover of Vogue. I've never been a big Sienna fan but I'm definitely curious to see what Anna Wintour dreamed up for this one.