By Georgina Littlejohn

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Shake it, baby! Jennifer Lopez takes to the stage at the iHeartRadio music festival in a red tasseled outfit that flashed her famous derriere during a very vigorous dance routine

She was just one of many acts to take to the stage during the star-studded iHeartRadio music festival this weekend.

But Jennifer Lopez left her contemporaries firmly in the shade with a sexy and sassy performance showing that the much-loved pop diva is well and truly back to her booty-shaking best.

It was certainly her intention last night with the focus on her famous derriere as she took to the stage in a red feathery tasseled outfit.

The 42-year-old strutted her stuff and left her backing dancers gaping in her wake as she shook her bottom - and then flashed it to her delighted backing band.

Jennifer was performing on the second and final day of the festival, which took place at the MGM Grand Garden Arena in Las Vegas.

You go, girl! Egged on by her wolf-whistling backing dancers, Jennifer wiggled and shook her curves and tassels

She performed a red hot set that include her new single Papi, and other hits including Get Right, On The Floor, Let's Get Loud, Ain't It Funny and her classic, Jenny From The Block.

And it proved to be a busy weekend for the star who jetted in from the set of her new film Parker in Boca Raton, Florida, to perform at the event.

Queen of the festival castle: Jennifer was adorned in a red feathered cape as she sat atop a velvet throne at the start of her set

Red hot: The singer threw off her cape and strutted down the stairs as she launched into her set

She was one of many acts that performed at the two-day festival, including Lady Gaga, Steve Tyler, Nicki Minaj, Nicole Scherzinger, Sting and Usher.

Gaga, who headlined the concert, was her usual wacky self as she arrived on stage on a motorbike that had been built up using car and motorbike parts.

Everyone wants a piece of you! Jennifer's dancers get up close and personal as they stroke her body during a routine

Twist and shout and rock 'n' roll: Jennifer is swing round by one of her dancers before rocking out with her guitarist

Anything you can do: Jennifer joins her suited and booted dancers in a high-octane routine

Dressed in a long leather studded coat, she teamed her look with a very wide tasseled black hat as she treated her fan-filled audience to a number of her hits, including Judas, Bad Romance and Just Dance.

She also spoke about her male alter-ego Joe Caldone and 'his' appearance at the MTV Video Music Awards last month.

Hello, boys! Jennifer can't help but smile as she looks admiringly at her muscular backing dancers

Speaking to host Elvis Duran, she said: 'Who does he think he is going on national television and speaking about my personal life like that? He’s a sucker.'

And in a rather poignant moment, she dedicated her song 'Hair' to Jamey Rodemeye, a 14-year-old boy who committed suicide after being incessantly bullied at school.

Biker chick: Lady Gaga appeared on stage on a customised motorbike that looked like a piece of modern art and a very wide rimmed black tasseled hat

The youngster, who was from Buffalo, New York, was found dead after an apparent suicide last week having posted in a blog for months about the bullying and how people would launch gay insults at him.

Before he died, he posted a lyric from Lady Gaga's song The Queen on his Facebook page which said: 'Don't forget me when I come crying to heaven's door.'

Energetic: Gaga jumped about in the air and showed off her pole-dancing skills

Strutting her stuff: Having stripped down to a sparkly body, Gaga got raunchy with her dancers

He also Tweeted the star and wrote: 'Bye mother monster, thank you for all you have done, paws up forever.'

Fighting back tears as she dedicated her song to him, Gaga told the audience: 'I know it's a bit of a downer, but sometimes the right thing is more important than the music.

Kooky: Nicki Minaj took to the stage in a layered purple dress and big curly bunched hair

Veterans: Steve Tyler and Sting jammed together during the Police star's set

Hello, ladies: Usher got his female fans in a frenzy with his sexy set

'Bullying is for losers. Jamey, you're not a freak.'

A surprise performance came from former Police frontman Sting who performed with Aerosmith star Steve Tyler, and Usher, who got his female fans screaming with his sexy solo set.

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