Remember Angelina Jolie's infamous Oscars 'leg bomb'? It's almost a year since the internet imploded with tweets and Facebook posts about the actress' right leg poking out of her velvety Versace gown. The celebrity fashion world fell about laughing - how could a fashion-forward individual Jolie make such a sartorial gaffe?

And then everyone started doing it.

It seems leg bombing has become a staple of the red-carpet for 2013 and Jennifer Lopez carried on the trend at the Grammy Awards on Sunday evening (February 10, 2013). Broadcaster CBS had warned music stars not to expose "female breasts," "buttock cracks," and "the genital region," ahead of the show at the Los Angeles Staples Centre, though it didn't stop Katy Perry wearing a ridiculously revealing dress, or J'Lo getting her leg out. "They said nothing about the legs! I thought I was being such a good girl! A little shoulder and a little leg," the R&B star told Ryan Seacrest on the red carpet. "It mentioned things I don't even say in my house around my children," she said of the now infamous memo. The 43-year-old's dress was made of satin and was designed by Anthony Vaccarello, for just under $5,000. 

She and rapper Pitbull later presented an award to Adele for Best Pop Vocal Performance, for Set Fire To The Rain (Live).