Khloe Kardashian is worried that estranged husband Lamar Odom is turning into a stalker after he tried to gain entry into the same L.A. nightclub where her and new boo French Montana were partying earlier this week. Apparently what triggered Khloe's concern is that French's appearance at the club was well-publicized, so it's probably not just a coincidence that Lamar showed up there. "She saw Lamar from her car and was like, 'WTF?'" a source says. "It was very much awkward but by the time she was inside, she'd already dusted the whole thing off."