Britney Spears' boyfriend Jason Trawick hates her music, sources say.

During socialite Paris Hilton's recent birthday bash, the talent agent apparently voiced his displeasure when the deejay played Spears' track 'Toxic.'

"Jason arrived with a male friend, but was definitely enjoying himself until DJ Mr. Best, threw on Britney Spears' song 'Toxic,'" Fox News quoted a source as saying.

The insider added: "When the song came on the first thing out of Jason's mouth was 'OMG I hate this song!' His friends all laughed and continued to talk, but he interrupted them by saying, 'I'm orry, I can't hear what you're saying over her voice.' He wasn't laughing." (ANI)