Chris and Karrueche leave his LA home Monday morning

*Chris Brown was back with his model ex-girlfriend Karrueche Tran Monday – barely 24 hours after kissing Rihanna, according to UK tabloid The Sun.

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According to the report, Brown and Tran were photographed together leaving Brown’s home in Los Angeles and “looking worse for wear.”

The pair sped off to a nearby recording studio, but not before stopping at a gas station.

Chris was just photographed on Saturday kissing Rihanna at a website launch party.