Is Demi Lovato Dating Katy Perry's Ex-boyfriend, John Mayer?

Four months, after ending up her relationship with Wilmer Valderrama, Demi Lovato was spotted dating and hanging out with John Mayer, who was the ex-boyfriend of Katy Perry.

According to Inquisitr, the 24-year old singer together with the 39-year old musician arrived and left the rooftop restaurant separately in Los Angeles last Saturday. "John had his arm around Demi and was whispering sweet nothings into her ear," a witness revealed.

The former Disney star was in her black T-shirt and miniskirt under a leopard print jacket. On the other hand, John is in his Hawaiian printed shirt and faded blue jeans. Several sources claim that this isn't the first time when the two was spotted together in interaction.

"She was into it. They weren't making out or anything, but she was giggling the whole time," another eyewitness claimed. "The pair chatted it up for over an hour and Mayer gushed that Lovato has one of the greatest voices.

As per Mail Online, later the same day, Demi told fans on Twitter the John was her 'inspiration' and 'idol.' Meanwhile, John compliments the singer, "You're going to make lots of records, I can tell. Write one song at a time and never, never apologize for any of them, ever."

To recall, the duo collaborated on a song 'World of Chances' together. "John Mayer's been a huge influence on me. His songwriting inspires me," Demi said. "I guess he had heard I was a huge fan, and he sent me a letter. Then we ended up writing together. And it was great 'cause he reached out to me, and it was like a dream come true.'"

After her split with Wilmer Valderrama, Demi has been linked to several men and sources claims that she is now dating UFC superstar Luke Rockhold and enjoying her single status. While, John was known as 'ladies' man and reported cheated on Katy Perry with Kelly Monaco and been linked in several famous women in the business.