Chris Brown and girlfriend Karrueche Tran arrived at the ESPY's pre-party at Lure in Hollywood last night in his freshly-painted Lamborghini (apparently he paid $10,000 to get his whip painted the same color as our website logo), and after checking in with security, Chris and his lady love were denied entry so they hopped back in his ride and drove home!

Our photog on the scene tells X17online exclusively, "Chris didn't seem that upset about getting turned away -- rather than making a scene he and Karrueche quietly left."

So why did the duo get rejected from the venue? "My guess is because the club didn't want to deal with the risk of Chris getting into a fight with someone," our lensman added. "It's happened before, and it can get pretty ugly." Can't say we blame them!

Though he's reportedly been on the rocks with Karrueche over the last few weeks, apparently after seeing a recent interview of hers, he realized that he wanted to make some changes. Karrueche appeared on BET