While lips remain sealed for rumoured lovers, "The X Factor" USA judge, Demi Lovato, and Wilmer Valderrama, the on-and-off celebrity couple spark romance anew as they were again spotted out and about in Beverly Hills on Sept. 29.

Demi and Wilmer were snapped leaving Barneys department store in Beverly Hills over the weekend despite efforts to confuse shutterbugs. Even if they left the store separately, they were seen driving away in an SUV driven by Wilmer.

The photo sparked rumours that Demi and Wilmer are, indeed, back together. The former couple had tongues wagging with rumours that they have rekindled romance since the death of Demi’s father in July 2013.

They have yet to confirm giving love another try.

But this is not the first time they were seen out with family and friends. Demi and Wilmer were also photographed having lunch with friends after a fun day at Disneyland in early September 2013.

This is also not the first time that Demi and Wilmer were seen shopping together. They were also photographed shopping furniture in June 2013, and the rumours that they have reconciled never died since then.

They may have chosen to keep their fans in the dark as to the real score of their relationship, but the on-and-off lovers appear to be expressive of their thoughts and feelings for each other on Twitter.

When Wilmer received recognition at the recent Alma Award, Demi was the first to tell the whole world about it in her post on the social networking site.

"Congrats to @WValderrama for his Outstanding Social Activism Alma award.. You are such an inspiration.. I'm so proud of you!!," Demi tweeted.

And Wilmer isn’t shy to say thank you for Demi’s nice words in his response on Twitter. "My @ddlovato, thank you for your sweet words.. Your thoughts mean so much to me," Wilmer tweeted.

Wilmer and Demi began dating in 2010. To see them at Barneys department store in Beverly Hills, Calif., click here.

Scroll down and check out the video of the rumoured couple as they enjoyed Disneyland last month.

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