With her single 'Skyscraper' lighting up the charts, Demi Lovato is now busy recording the rest of her album. Among her collaborators is superstar hip-hop producer Timbaland, who tweeted a photo of the two in the studio.

"Me and Demi workin on a hit baby!," wrote Timbaland as he presented the photo. He added, "The songs i did 4 @ddlovato are dope as hell. cant wait til yall hear dem joints."

Timbaland has helped write and produce hits like Justin Timberlake's 'SexyBack,' Nelly Furtado's 'Promiscuous,' Madonna's '4 Minutes,' and dozens more since the mid-'90s. It will be interesting to see what kind of sound he creates for the 18-year-old pop singer.

Timbaland tweeted a second photo showing Lovato with another of his famous collaborators, Missy "Misdemeanor" Elliott. Lovato tweeted news about the late-night studio session as well. "Listening to so much talent in this studio right now.. Honored to be here! 5:30 am still goin' strong!," she wrote.

'Skyscraper' reached the Top 10 on Billboard before falling back this week as digital sales dropped off. Lovato has said her next album will drop on September 20, though that could be optimistic since she's still recording.

Watch the Demi Lovato 'Skyscraper' Video