Two undefeated champs ... but only one of them is smiling. Chris Weidman grabbed a photo op with boxing kingpin Floyd Mayweather Jr. while living La Vida Loca last Sunday in Las Vegas, Nevada. Why so happy? Well, the "All American" beat the brakes off Vitor Belfort at UFC 187 to retain his middleweight strap (video) and now gets to hang out with guys like "Money," who doesn't appear to be as enthused as his new mixed martial arts (MMA) buddy. C'mon Floyd, say cheese!