And in a weird twist of fate, while Cameron Diaz (ex of Justin Timberlake) has started dating John Mayer, Britney Spears (another JT cast-off) was seen heading to an L.A. hotel at 4 a.m. today with another one of Cam's former flames -- magician/womanizer, Criss Angel! (Yeah, we're shuddering to think about it, too.)

Click here to see the proof, care of INF Daily.