Demi Lovato Showers "Inspiring, Incredible" Wilmer Valderrama with Birthday Love

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She may remain mum on the nature of their relationship, but Demi Lovato has no problem letting the world know how she feels in general about Wilmer Valderrama.

Spoiler Alert: she's a very big fan.

In honor of the actor's 34th birthday yesterday, Lovato posted the following collage on Twitter and included with it the following message:

“To the funniest, most inspiring, incredible man I know.. @WValderrama – thank you for helping me get through my darkest moments.. You truly are a light to this world and to my life.. Happy Birthday!!!"

Way back in August, Lovato and Valderrama were spotted at Disneyland, prompting speculation that they are back together.

Neither side has ever confirmed a romance, but an insider does confirm to E! News that the ring on Demi's finger these days is NOT an engagement ring.

Lovato, meanwhile, has spent the week making contact with other celebrities as well.

She dined with Selena Gomez a few days ago and she gave Ke$ha props for entering rehab and tackling her eating disorder straight on.

"I wish her the absolute best and I think she is doing a really great thing for herself," Demi said of the singer. "It's really great when you take time out of a schedule that everybody wants you."

Lovato and Ke$ha are two famous people who have gone to rehab, as rehashed in this slideshow:

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Demi Lovato Biography

Many think Demi Lovato is being groomed to be the next huge Disney star. She appeared in the movie Camp Rock, alongside those gorgeous... More »
Dallas, Texas
Full Name
Demetria Devonne Lovato

Demi Lovato Quotes

I hope to do a collaboration with Kelly Clarkson. [She] has been my idol growing.

Demi Lovato

I'm very uncoordinated. I'm surprised I don't fall onstage more.

Demi Lovato