Britney Spears Can't Stand Justin Timberlake's Voice

"What Goes Around" came right back around for Britney Spears last night.

TMZ spies caught Justin's ex enjoying a night of drinking and partying with former *NSYNCer JC Chasez -- yeah, Timberlake's old pal -- at club Marquee in NYC, where Spears had a very public jealous moment.

With black thong underwear sticking out of her jeans, Spears decided to check out the DJ booth. Just as she got over to the wheels of steel, the DJ pressed play on a Justin Timberlake track. By the look on her face, Britney was none too pleased.

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