Jennifer LopezLopez: Problem bumJennifer Lopez's large bum has caused problems for the makers of a new commercial. 

The 35-year-old star was filming Pepsi's £11m new advert when they reportedly discovered she couldn't fit into her skimpy costume.

Producers frantically tried to stitch an extra piece of leather to the sexy black outfit to help cover J. Lo's curvy bottom.  

"Not surprisingly, there were lots of volunteers for that job," a set insider told the Daily Star.  

"There were all these people ready to get on with the work when we realised there was a problem."  

The source added: "Basically, J. Lo's bum was just too curvy for the outfit and we had to make sure the costume fitted her before we could start filming."  

The Latino diva teamed up with England captain David Beckham and R&B star Beyonce Knowles at London's Shepperton Studios to film the world's most expensive advert.  

"Beyonce fitted into her costume easily but J Lo just couldn't squeeze in," the insider added.