Ab fab: Jennifer Lopez proved that she still had the abs of steel she maintained before the birth of her two-year-old twins, as she promoted the new Blackberry Playbook at Best Buy today

The singer was signing autographs for the first 200 customers to purchase the new technology or pre-order her new album titled Love?.

The mother-of-two showed off her tight stomach muscles in a black and white patterned bandeau tube top, which she paired black harem-style pants and a tan waterfall jacket.

She accessorised the look with some black platform peep-toe stilettos and wore her caramel coloured hair in loose waves.

And it seemed that her belly baring look was a hit. She gave birth in February 2008 and she did not look like a woman that has carried twins.

Belly baring: Jennifer showed off her tight stomach muscles in a black and white patterned bandeau tube top, which she paired black harem-style pants and a tan waterfall jacket

Jennifer was forced to exit via the back entrance of the store with around ten  bodyguards in tow as fans swarmed to see her.

But the ever gracious entertainer made time to give the crowd a wave before hopping into a black SUV and being whisked away.

Lopez has just  revealed how she turned down Simon Cowell for a place on the US X Factor.

‘We did talk about The X Factor for a little bit,’ she told the Daily Star today. ‘But at the end of the day, thinking about my career and everything that was going on, when the opportunity to do Idol came along it seemed a better fit.’

Kisses: The ever gracious entertainer made time to give the crowd a wave and blow some kisses

‘Idol has been a show for so many years. It’s an institution. To be involved in something like that felt really great.’

But with her singing career back on top, Jennifer says she hasn’t committed herself to another season on the show.

‘I don’t know if I will do another season. I’m taking it day by day at the moment and we’ll see what happens,’ she says.

Last week she shot scenes for her upcoming music video with a steamy beach shoot with the man dubbed ‘the Brad Pitt of Mexico.’

Tight security: Jennifer was forced to exit via the back entrance of the store with around ten  bodyguards in tow as fans swarmed to see her

The singer looked like no time has past in recently-released pictures from the set of I’m Into You video shoot, romping on the beach in a revealing diamond dress.

The dress showed off her famous curves just like the tiny white dress she wore in her 1999 hit If You Have My Love, that made hers one of the world’s most lusted after bodies.

In the video the American Idol judge cosies up to shirtless actor William Levy, 30, in sensual beach scenes filmed at Turtle Beach, that are sure to make husband Marc Anthony a little nervous.

Still got it: Her revealing look comes after she recently proved that she’s still got it in a steamy beach shoot with the man dubbed ‘the Brad Pitt of Mexico’ for her new video I’m Into You

Cuban-born Levy is called ‘the Brad Pitt of Mexico’ according to Us Weekly.

The star of Mexican soap operas says of his gorgeous leading lady: ‘It was wonderful. I felt very comfortable. She is a very sincere and fun person.

The truth is I had a really great time,’ he added. ‘It was wonderful to see that someone so huge could be so down to earth, in addition to being really funny.’