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Jessica Biel may be headed for heartbreak, after tabloid tattles caught BF Justin Timberlake canoodling poolside with one of his stunning female backup dancers while touring in Australia.

According to The Sun: Justin sat sprawled on his stomach across a banana lounge, Justin chatted away casually to his bikini-clad companion as she flirtatiously played with her hair and seductively slathered sunscreen on her long legs.

“Jess is fed up with Justin going out and playing like he’s a single ladies’ man,” says a source.