By Daily Mail Reporter
High fashion: Jennifer Lopez looked chic in a Lanvin leather dress and Salvatore Ferragamo heels as she arrived at the London premiere of her film The Back-Up Plan
It is a sight most celebrity-watchers thought they'd never see - Jennifer Lopez sharing the red carpet with Kerry Katona.
In a case of A-list meets D-list, Katona appeared to be the most famous guest in attendance at Jennifer Lopez's film premiere in London's Leicester Square, which was besieged by Z-listers.
While Katona looked svelte in a black jumpsuit and heels, she couldn't match up with the Hollywood glamour exuded by J-Lo.
The mother-of-twins, 40, showed off her curves in an asymmetrical leather Lanvin gown and a pair of black satin Salvatore Ferragamo heels, completing her look with a huge beehive.
Katona's arrival at the premiere marked the 29-year-old's first big media event since moving from Cheshire to Surrey last week.
While Lopez was in good company at her LA premiere last week with celebrity pal Heidi Klum, the London premiere attracted a host of reality TV stars.
Among those in attendance were Big Brother 8 twins Sam and Amanda Marchant, Love Island winner Bianca Gascoigne, X Factor runner-up Stacey Solomon and socialites Tamara Ecclestone and Hofit Golan.
Golan made sure she stood out from the crowd in a bizarre white and blue asymmetrical dress with flesh-baring panels cut out at the side
Back in the spotlight: Kerry Katona enjoyed being in the limelight in a black jumpsuit
Also at the Vue cinema was X Factor 2008 winner Alexandra Burke in a fishnet dress, TV presenter Jenni Falconer and classical boy band Blake.
Lopez has travelled from LA to New York to Paris to Madrid in the past week on her gruelling promotional tour for the new movie - her first big film role in three years - before arriving in London today.
She was joined by on-screen love interest Australian actor Alex O'Loughlin and director Alan Poul.
The film stars Lopez as pet store owner Zoe, who resorts to artificial insemination to get pregnant after failing to find the right man.
J-Lo mania: Lopez delighted fans as she signed autographs and posed for photographs with the hundreds of fans crowded into Leicester Square
Screen stars: Lopez joined her Australian co-star Alex O'Loughlin and director Alan Poul
It's only after she finds out the IVF has been successful and that she is expecting that she meets handsome Stan (O'Loughlin), who may or may not be the man of her dreams.
The film reached an acceptable number two at the U.S. box office last weekend, but failed to beat No.1 How To Train Your Dragon, which was released four weeks ago.
The film has received more negative reviews than positive, but critics seem to be in universal agreement that Lopez looks stunning on screen.
Standing out: (L-R) Tamara Ecclestone looked very tanned in her purple mini-dress, Israeli socialite Hofit Golan flashed the flesh in an unusual dress, while TV presenter Jenni Falconer played it casual in jeans
Time magazine critic Mary Pols wrote: 'The actress who charmed in The Wedding Planner and held her own with George Clooney in Out Of Sight seems to have forgotten everything she ever knew about acting.
'The best that can be said about her is that she's game for some mortifying on-screen moments. But whether Zoe is having a pelvic exam or a spontaneous screaming orgasm brought on by kissing (supposedly generated by pregnancy hormones, but we're dubious), Lopez always looks more like she's posing for In Style than embodying a real woman.'
America's leading film critic Roger Ebert said: 'Jennifer Lopez has never looked better. That's about all she does here, is look better.'
Back to reality: (L-R) X Factor 2009 third-place Stacey Solomon, Love Island winner Bianca Gascoigne and X Factor 2008 winner Alexandra Burke
Speaking on the red carpet last night, Lopez said she told the director to include the less attractive elements of pregnancy in the movie.
She said: 'There's a couple of scenes in the movie where I'm eating and pigging out and they didn't put them in the first cut - I was like "Listen guys, this is extremely important for women."
'They need to see me pigging out. This is what happens when you get pregnant. You get really sleepy. You get really hungry. You get gas.'
• The Back-Up Plan is due for release in the UK on May 7.
Twin-credible: Big Brother twins Sam and Amanda Marchant
Dapper: (L-R) Stephen Bowman, Jules Knight, Humphrey Berney and Oliver Baines of classical boy band Blake