Sisqo backtracks her claim Britney didn't sing in the megahit S&S & gets dragged during the process

Britney Spears' rep is calling BS on Eve's insinuation that Britney didn't sing on her new release, "Scream & Shout."

Jeff Raymond, B.S.'s publicist, tells TMZ, "It's absolute BS. Britney sang the song. wanted her for this song and she sang on it."

Eve went on Bravo's "Watch What Happens Live" and said, "I heard that might not be Britney."

A source from the recording studio cattily tells TMZ, "Was Eve even in Studio. Didn't know. She's clearly jealous. I didn't even know she still sings." Mariah?

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