We're still waiting for some sort of official confirmation on the split between Justin Timberlake and Cameron Diaz, but that doesn't mean it's too early to start speculating - especially if Justin's going to start flying solo like he did last night! First we caught JT attending the premiere of Alpha Dog, Justin's first flick to get a theatrical release, then hitting up the afterparty a little later - but we never saw Cameron with him! (Somehow, I don't think the gaggle of his female fans standing next to our photographersat the afterparty would object too much to that!)