Los Angeles - Chris Brown's girlfriend is reportedly angry that he kissed Rihanna at the 2012 MTV Video Music Awards.
The singer's partner Karrueche Tran witnessed the display of affection along with a television audience at the Staples Centre in Los Angeles last week.
Apparently the 23-year-old aspiring model is "totally pissed off" with her boyfriend of almost one year for allowing the peck after winning Video of the Year at the annual gathering.
'Kiss was a public slap in the face'
A source told UsMagazine.com: "She felt the kiss was a public slap in the face."
Rihanna and Chris parted ways in February 2009 after he brutally assaulted her and has been rumoured to have rekindled their romance.
The insider added: "Karrueche and Rihanna really hate one another and Chris ultimately just does what he wants.
"Seeing him with Rihanna at such a public event made her very angry."
Rihanna recently opened up about her complicated feelings for her ex to Oprah Winfrey, calling him "the love of my life" as she was interviewed for her television show The Next Chapter.