It’s not your average night out at a karaoke bar when Gerard Butler, Demi Moore and Michelle Monaghan drop in, but that’s what happened this weekend at Rockstarz in Detroit.

The A-listers are all in town filming and met up for a raucous singalong at the bar, belting out hits including Sheryl Crowe’s All I Wanna Do and AC/DC’s You Shook Me All Night Long.

Demi and Gerard have been friends since they visited Haiti together for Artists for Peace, and Michelle stars in Butler’s latest film, Machine Gun Preacher. Meanwhile Demi is in town filming LOL with Miley Cyrus – who may have been able to put the other three celebs to shame on the mike, but is obviously too young

There was something different about chubby Scotsman Gerard Butler as he filmed scenes in a Detroit trailer park yesterday. Was it the the tattoos. leather waistcoat or Harley Davidson T-shirt?

Nope, it was the greasy, slicked back mullet that he was sporting!

The actor was shooting The Machine Gun Preacher and his new (well, really it’s retro I guess!) look was for his role in the movie. But although there’s a slight Wolverine look about him when he’s on his motorbike, I think Hugh Jackman’s the only one who can pull that ‘do off!

Apparently Li-Lo and Scot serial shagger Gerard Butler are more than ‘just good friends’. The pair was pictured together at an LA party last week getting up close and apparently afterwards they went to a hotel together. To be a fly on the wall…or a SCRAM on the ankle!

Says a source: “They arrived at the party separately. When they saw each other they got together and embraced.

“As the afternoon wore on, they became more and more friendly and eventually one thing led to another and they left together.

“Friends said they went off to a hotel. They were all over each other at the party, really not leaving each other’s sides.”

Is this really a good idea Gerard? Gerard has been tee-total for years and Lindsay has been tee-total for, er, days. Maybe he’ll be a good influence on the ‘troubled’ star!

Jennifer Aniston and Gerard Butler have been working HARD to promote their latest film The Bounty Hunter, but it seems their efforts (and red carpet gropes) have been wasted.

The film has taken just £3.8m at the UK box office since its release two weeks ago, which added to its measly $48m at the US box office equals a box-office flop.

And the critics have been vicious to Jen, who is so desperate to prove herself as a movie actress rather than ‘Rachel from Friends’ (as Ricky Gervais called her at The Golden Globes).

TBH only got an 8% rating on movie website rottentomatoes.com and one critic, from The Scotsman said:

“The Bounty Hunter fails to locate any laughs or charm over two punishing hours as its chemistry-free leads, Gerard Butler and Jennifer Aniston, mug their way through two of the worst performances they’ve ever given.”

Oh dear. Looks like an epic fail for Jen and Gerry. Time to wheel out the ‘showmance’ again to get more bums on seats? Judging by the lack of chemistry in the film, we’re not buying it, on or off screen.

What do you reckon – is Jen still America’s sweetheart or should she ditch the rom-coms for good?

So much for Jennifer Aniston and Gerard Butler being an item if this story is anything to go by…

Beefcake But’s was spotted strolling around Paris at the weekend hand in hand with local TV interviewer Laurie Cholewa.

According to sources Butler met Cholewa the prior weekend, returning to Paris midweek for a full-on date that apparently lasted well into the night. One insider told People that Gerry “completely cracked” for Laurie during their sit-down interview promoting his latest film The Bounty Hunter in which he stars with Aniston.

Now reports are hinting Gerry has struck up a relationship with Cholewa…

Wow, Butler works fast, eh? Only last week paps caught Gezza at on the Seine River in Paris with his hand placed suggestively placed on Aniston’s backside giving off the impression there was a lot more going on than just promoting a movie.

So I wonder what will Jen make of all of this? Can’t wait to hear what the folk in her camp have to say!

What’s happened to the beefy and brawny Gerard Butler we all know and love, eh?

A copy of next month’s Architectural Digest has just landed on my desk with none other than beefcake Buts’ himself, gracing its glorious May cover!

Apparently the hot Scot’s new batch’ pad is boasting ‘thirteen-foot-tall mahogany doors’ and a ‘knocker’ that could summon the dead.’ Oo-er, you’ve got a knocker that wakes the dead, eh Gezza? So I’ve heard matey!

Stick a fork in her – she’s done! Hot chick Jennifer Aniston stepped out in a tinfoil-inspired minidress at last night’s premiere of The Bounty Hunter in London.

She paired the silver Valentino frock with Jimmy Choo heels and an Alexander McQueen tuxedo jacket and mancessory, co-star Gerard Butler.

The pair cuddled up for the cameras and lavished praise on each other.

Gerard, who I bumped into at the Chateau Marmont in LA last week said: “There’s nothing diva-ish about her, she’s very down to earth, very sure of herself and who she is, and I’m like a little kid, who doesn’t take myself too seriously.”We had a fun script and a great director, so we just had to dive in and it was a blast.”

The lovely Jen responded by saying, “I love my Gerry. We just lucked out – director fantastic, Gerry fantastic, our crew, New York – you just can’t go wrong.”

But despite rumours that they enjoyed an off-screen romance Gerard insists in this month’s Men’s Health that he’s not the womaniser people think he is. He said: “I get laid less now that I used to, because I’m way more paranoid now. Look at f***ing Tiger Woods.”

Er, I can understand you being worried about kiss ‘n’ tell stories Gerry, but it’s a slightly different situation. You’re single Gerard so you can s**g who you like.. And don’t forget, you were chasing every bit of skirt you could at parties thrown on Oscars week… I saw you dude! Does the name Sheila Shah ring any bells?!

Gerard Butler and Jennifer Aniston did a steamy 27-page shoot for W magazine this month to promote their new film, The Bounty Hunter, which will no doubt get the tabloids chattering about the nature of their relationship. Again.

The pics show Gerry dressed as a policeman with the pair all over each other in the desert and covered in California dust.

The photographer Steven Klein described the concept as the “searing heat of the California desert where damsels aren’t always in distress and lawmen sometimes break the rules.”

Yawn.

I like both Gez and Jen but it’s funny how Jennifer always has a love interest around the time she has a film to promote (just saying). Still, they both look hot, and that’s the main thing!