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Now this is how you make a comeback!

Hot on the heels of her successful first-post rehab single, "Skyscraper," Demi Lovato hit the studio for some late nights with Timbaland and Missy Elliot.

The former Sonny with a Chance star is working with Timbaland on her as-yet-untitled third album, dropping September 20, and the Grammy winning producer is just as excited as Demi. Along with the cute pic above, Tim Tweeted, "Me and Demi @ddlovato workin on a hit baby!"

During a Cambio live chat last week, Demi told fans that she's already recorded about 20 songs. "I'm feeling really, really comfortable on what we have so far," she said. Timbaland agrees - he's Tweeted that Demi's been killing the songs he's giving her.

We're not sure if the sepia-toned pics are helping them churn out the hits, but Demi's clearly doing something right working with Missy too. “4 am: @MissyElliott and demi lovato @ddlovato working hard in the studio! #demiandmissy,” Timbaland Tweeted.

Timbaland has wanted to work with Demi for months now - which is high praise in itself. See what he had to say about the singer ... after the jump.

Demi Lovato has revealed that she suffers from bipolar disorder, People magazine reports.

The actress, 18, quit her tour and entered a treatment center in November after punching one of her dancers. Lovato says her three-month rehab stay, where she underwent therapy for anorexia, bulimia and cutting, is also where she discovered that she was bipolar.

"Looking back it [the diagnosis] makes sense," she says. "There were times when I was so manic, I was writing seven songs in one night and I'd be up until 5:30 in the morning."

Last week Lovato tweeted a message of support to actress Catherine Zeta-Jones, who just opened up about her struggles with bipolar disorder and checked into a rehab facility earlier this month.

"I feel like I am in control now where my whole life I wasn't in control," Lovato says.

Yesterday a Sheriff's helicopter was used to locate a supposedly distraught Timbaland who was upset over a stolen $2 million watch, but reports that this missing watch had made him suicidal were "significantly overblown," LA County Sheriff's spokesperson Steve Whitmore tells X17online exclusively.

"There was no suicide attempt," says Whitmore. "There may be a watch missing, but that's about all."

It's true that someone called saying that they didn't know where Timbaland was, and standard procedure dictates that the Sheriff must investigate these claims. A helicopter was dispatched simply because "it was already in the area," not because Timbaland was in immediate danger.

"He was never in danger, he was fine," Whitmore tells us.

Justin Timberlake? Of course. Chris Brown? Why not! But Miley Cyrus? WTF!

Timbaland's third solo CD drops November 24th and tons of talented singers show up on it, including JT, Katy Perry, The Fray... and Disney tween Ms. Miley.

She'll open the album on the song, "We Belong To The Music."

Damn, first making a cameo in the Sex and the City sequel and now this?

Girl's growing up fast!

St. Tropez might be a remote little vacation destination - but over the weekend, the tiny resort town played host to some of the biggest names in music!

For instance, we caught Kid Rock out having some fun with his pal David Furnish. The Kid and Elton's hubby have actually been friends for years - but we still think they make a pretty odd couple!

Elsewhere, we caught producer/performer Timbaland heading into the VIP club after an epic concert earlier in the night. Can you believe that Shock Value's still doing so well after having been out for over a year?

In a statement from Monique Idlett, Timbaland's new bride (and publicist):

"Timbaland is ecstatic about his marriage to the lovely, beautiful, and gracious Monique Idlett. She is the love of his life and the two will most certainly live happily ever after."

Kidding ... Us Weekly confirms the two wed in sweats yesterday in Virginia. They'll have a formal wedding in Aruba on June 22. The couple have a baby girl together, Reign, who was born last year.

To the great surprise of almost nobody, Timbaland's been keeping a pretty low profile since getting picked up for fighting in Cologne last week. Take yesterday as an example - our French desk spotted him in Paris perusing Piaget's selection of watches before continuing his shopping expedition in silence and on foot. Heck, Timbo wasn't even seizing the opportunity to flaunt his still-pretty-surprising guns for the benefit of all the French ladies - let alone any other racists looking to start trouble!