Chris Brown and Rihanna's roller coaster relationship seems to be on a downward slope these days, as an insider revealed that Chris has cut off all communication with his former lover. According to Hollywood Life, the "Fine China" singer also took their duet for his upcoming album, "X." 

"He's not featuring Rihanna these days. They don't talk. They're done. Nada. Nothing. They're not on that level right now. He's not thinking about her in any capacity."

Another source added, "Just saw the working track list for X yesterday — Rihanna is not on there. Record execs wanted that song on there, but Chris said he would rather not and wouldn't allow the record to be released unless they took it off."