Blair Waldorf returns to her scheming ways on next week's Gossip Girl.

On last night's episode (see our review of "Despicable B"), our girl admitted she has no idea who she even is anymore. Well, looking ahead to next Monday's installment, she takes on a new persona altogether:

Diana Payne.

When Chuck and Nate enlist Blair to uncover what they think is an explosive secret between Diana and Jack, she looks the part as she impersonates the sexy Brit, rocking that blue dress (and accent) like a champ.

Will the scheme team succeed in uncovering the truth? And will Dan's being offered a prestigious fellowship in Rome this summer threaten to derail his blossoming courtship with Queen B?

Watch the promo for "Raiders of the Lost Art" and comment below:

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.