As if Chris Brown's love life was not confusing enough already. The rapper was back with his model ex girlfriend Karrueche Tran yesterday - barely 24 hours after his smooching session with Rihanna. The pair were photographed looking worse for wear as they left Chris's Los Angeles home.The star, 23, hid under a baseball cap, while Karrueche sported a tiny T-shirt and shorts under a baggy baseball jersey.It's only been three weeks since Chris kicked Karrueche to the curb - admitting afterwards he was tormented by his feelings for both her and Rihanna.But Rihanna, 24, doesn't seem so pleased about being traded in so quickly after her clinch with Chris.The singer yesterday tweeted a string of photos of her smoking suspicious-looking cigarettes along with a cryptic message that could be addressed to Chris.It read: "No matter how 'busy' a person is, if they really care, they will always find the time for you." The American Grammy Award winner Brown is expected to perform in Uganda on December 21. The Sun