America's favorite couple, Heidi Montag and Spencer Pratt, took a trip to Las Vegas on Wednesday to film scenes for The Hills. Spoiler alert: It seems Speidi is still moving forward with the "our relationship is on the rocks" storyline.

Sources at various casinos tell People that not only did the couple stay in different rooms, they’re actually in different hotels.

'Yes it is true,' a rep tells People. 'They are working on their relationship … They were there filming The Hills.'

While in Vegas working on the show, the on-again, off-again couple was spotted arguing for the cameras at the Palazzo’s Dos Caminos restaurant. When the cameras stopped rolling on multiple occasions, Pratt left the restaurant while Montag stayed behind, hanging out with Los Angeles club promoter and her Hills boss Brent Bolthouse. Interaction on and off-camera was limited between the two.

Interesting, since this photo of the two "lovebirds" was taken just last weekend. We can't decide whether it's the fighting or the romance that's fake, but one thing is certain: Many years from now, someone is going to need therapy.

[Source]