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A single Justin Timberlake hit up nightclub Tru last night ... perhaps in search of a new girl?

No doubt he's got his SexyBack now that he's girlfriend-less again. Reports claim he and Jessica Biel are giving their relationship a go again, but we haven't seen them together ...

Co-star and rumored hook-up Olivia Wilde had got her hands full being Hollywood's new "It" girl and the fling with Olivia Munn's been over for a while.

So who's next for JT? Random club girl? Or another LA starlet?