Him Against The Music: Ke$ha has some company in her campaign to shut up Britney Spears. Word is even Britney’s own boyfriend — FYI: The guy who treated her to McDonald’s on Valentine’s Day — isn’t a fan of at least one of the lip-syncher’s famous pop tunes.

Talent agent Jason Trawick, who has been romantically-linked to Spears for nearly a year, had some choice words about his missus’ music while hanging out at Paris Hilton’s Studio 54-themed birthday bash (How many times is this woman going to turn 29), FOX News’ 411 Column reported Wednesday.
A spywitness told the column: “Jason arrived with a male friend, but was definitely enjoying himself until DJ Mr. Best, threw on Britney Spears’ song ‘Toxic.’ 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 sorry, I can’t hear what you’re saying over her voice.’ He wasn’t laughing….”