Published: 08:42 BST, 6 December 2012 | Updated: 17:54 BST, 6 December 2012
She has hit headlines over the past few months with her increasingly erratic behaviour.
So the latest pictures of Demi Moore are likely to cause concern among her family and friends, as the actress was seen exhibiting some very bizarre behaviour at a party with Lenny Kravitz on Wednesday night.
The 50-year-old actress played up to the photographers present at the Chanel Beachside Barbecue held at Soho Beach House Miami, leaving friends including Kravitz and George Clooney's girlfriend Stacy Keibler bemused by her antics.
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Dancing Demi: Ms Moore displayed some very bizarre behaviour as she partied with friends including Lenny Kravitz at the Chanel Beachside Barbecue on Wednesday night
What's going on here? Lenny looked less than impressed by Demi's bold moves
Getting the party started! Lenny turns away as Demi busts a move
As she enjoyed a chilled out sit down with Kravitz, Demi couldn't resist busting some moves in time with the music.
The mother-of-three, who wore a chic grey playsuit for the occasion, was seen lifting her arms and bumping and grinding while in her seat, as Kravitz appeared embarrassed and looked away.
While it is not clear whether or not Demi was drinking at the evening, an array of energy drink cans were seen in front of her on the table - perhaps giving some explanation to her behaviour.
Hungry? Demi appeared to be eating her own hair as she posed for photographers at the event
Cuddling up: Lenny and Demi shared a joke on the sofa at the event, with Lenny looking somewhat bemused by his pal's antics
She's got some moves: Demi couldn't resist bumping and grinding in her seat as the tunes played at the event
Ready to party: Demi clutched a can of energy drink as she made the most of the evening
Alone in her thoughts: Later in the evening, Demi was left with no-one to talk to as Lenny began chatting to another woman
As well as her dancing, Demi was seen playing around with her hair - pulling her raven locks in front of her face as she posed up with Lenny.
Later in the evening, Demi found a new friend to play with as she posed with Stacy, who did her best to give the waiting photographers a chic shot - despite a slightly manic-looking Demi clinging on her arm.
While Demi's new beau American art dealer Vito Schnabel, 26, was at the event, the pair didn't pose up together, but were rumoured to have indulged in a passionate PDA inside.
Rock on! Demi and Lenny appeared deep in conversation at points during the evening
Feeling shy? Demi did her best to conceal her giggles by pulling her hair over her face, while Lenny continued to look unimpressed
Cuddling up: The couple bid farewell to each other with a long hug at the end of the evening
Centre of attention: Demi and Lenny were surrounded as they enjoyed their chat
A source told E! News: 'They are definitely a couple. She is definitely more down to party than Vito.'
And the source added of Demi's partygoer attitude: 'She was most ready to party than anyone else in the room!'
Other stars to attend the Chanel event included model Karlie Kloss and Rupert Murdoch's wife Wendi, as well as Roman Abramovich's girlfriend Dasha Zhukova.
Best of friends: Demi looked slightly manic as she posed for a photograph with George Clooney's girlfriend Stacey Keibler
That's better! Demi toned things down for a second shot alongside Stacy
Geek chic: Demi wore a grey playsuit with a pair of black heels and thick-rimmed glasses for the party
Too short! Demi did her best to pull down her short playsuit as she stood up from the sofa
Possy cat pussy cat: Demi was seen cuddling a random cat
Choupette's friend? Demi was seen stroking the cat as she sat with Dasha Zhukova
Demi has been keeping something of a low profile since announcing her marriage to Ashton Kutcher was over in November 2011, and is rarely seen at red carpet events.
As well as dealing with her marriage breakdown, she has also been struggling with health issues and checked into rehab last January.
But following her recovery, Demi has thrown herself into her acting career and has landed a part in the highly anticipated drama Very Good Girls, which also stars Elizabeth Olsen and Dakota Fanning.
Moving on: Demi attended the event with her new toyboy beau Vito Schnabel, but the pair did not pose up together inside
Girl time: Inside the event, Demi posed with (left to right) Wendi Murdoch, model Karlie Kloss and Dasha Zhukova
Different styles: Wendi and Dasha opted for pink dresses, while Karlie kept it simple in a full-length black vest dress
Sharing stories: Demi and Wendi enjoyed a long conversation inside the party
Meanwhile, Ashton has been dating his former That 70s Show co-star Mila Kunis, and the couple have been flaunting their love on various occasions recently - apparently inseparable.
Despite the fact that both seemed to have moved on from the relationship, Demi and Ashton however have yet to file for divorce.
Black and gold: Former 902120 actress Lori Loughlin wore a festive-style outfit for the event
Friends night out: Olga Kurylenko attended with actor Danny Huston, while musicians Leigh Lezark and Greg Krelenstein of The Misshapes arrived together
Demi had worried friends over the summer when it was revealed that her three daughters had cut contact with her following her split from Ashton.
But thanks to her daughter Rumer's boyfriend Jayson Blair, who instigated peace talks between the pair, the mother and daughter have reconciled and turned a corner in their relationship.
Calling it a night: Demi appeared slightly bleary-eyed as she headed home from the star-studded event
Night night Demi: The actress looked less willing to be photographed as she called it a night
VIDEO: Demi shows off her dance moves in the 1996 trailer for Striptease...