Rumor has it that popular "Skyscraper" and "Really Don't Care" singer Demi Lovato has split from the 'From Dusk till Dawn' actor, Wilmer Valderrama.

The buzz about them breaking up is based on the couple not being seen together anymore. It has been a month since the two were last spotted at a function at the White House with President Barack Obama.

Tweets from the 'That 70s Show' actor were also creating speculation because of how they sounded. One of his tweets says, "Your desire to live in happiness is only a state of mind away." The other one says, "We all grow up with fears...But few of us evolve to overcome them."

Radar Online has recently denied that Lovato and Valderrama have broken up. They said that the relationship of the sweethearts is stronger than ever, despite the many ups and downs. According to the source, those bumps on the road are the things that make their relationship solid.

One of the incidents that shook their relationship happened in June, when the actor's Twitter account was hacked and alleged pictures of the singer were posted. In those pictures, she was described as fat. There were people who even speculated that Valderrama was in on the whole Twitter hack.

However, sources say that the lovebirds are just busy with their respective careers. Valderrama is busy promoting his upcoming TV series.

On the other hand, Lovato's schedule is hectic because of her new album that will soon be released. The album features five songs including "Avalanche" with singer and friend Nick Jonas, who recently said he has a special bond with her.

From one of the interviews with Jonas, he mentioned how he and Lovato are having fun creating music together.

"It's so easy to do a duet that's a love song because our relationship isn't really that," said Jonas, "But there is love for a friend, you know, and that's beautiful to just talk about."