Las Vegas rocks on day one of the iHeartRadio festival

Day one of the iHeartRadio festival got off to a flying start on Friday with a huge host of rock and pop stars turning out.

The crowds in Las Vegas were treated to the likes of Usher, Rihanna, Bon Joni, Green Day, Pink, Gwen Stefani and Lil Wayne.

Held at the MGM Grand over two days, this is the second time the annual event, which is aired through the iHeartRadio digital music platform, has taken place.

Radio and TV presenter, Ryan Seacrest, who is the festival's host, was joined by a guest appearance from Britney Spears. Ryan has previously praised the event, saying that the sheer size and standard of the lineup sets it apart from other festivals. He added that that the spark for the most unexpected collaborations can happen at events like this one.

Singer Miley Cyrus looked glam with her stylish hairdo, cropped black top, silver skirt and matching leopard print accessories


American band Bon Jovi, made up of drummer Tico Torres,  keyboardist David Bryan, guitarist Richie Sambora and lead singer Jon Bon Jovi arrived on the red carpet 

Usher, 33, couldn't wait to get dancing as he arrived for the festival 

Jon and Richie of Bon Jovi 

Clad in a jacket resembling the American flag, Jon Bon Jovi gave a rousing performance


American singer Jon Bon Jovi proved he's just as good as ever aged 50


Pop Queen Britney Spears made a guest appearance on stage sporting rainbow coloured locks and glittering heels 

Green Day's lead singer Billie Joe Armstrong got up close and personal with the crowd 

True to their punk rock star image, three-piece band Green Day smashed their instruments during the gig


Gwen Stefani looked flawless, showing off her toned stomach as she sang with No Doubt 

Platinum-haired beatuies and leading ladies of the music industry, Gwen Stefani and Pink performed their new song Just a Girl together 

American singer and dancer Usher showed off his moves 

Hip Hop artist and rapper Lil Wayne


Crowds went wild for superstar Rihanna as she performed her renowned song Umbrella


Dance music trio Swedish House Mafia gave an awesome and electric performance 

Olympic swimmer Ryan Lochte attended the festival, introducing rapper Lil Wayne before his performance 

Backstage Richie Sambora posed with Miley Cyrus and Green Day frontman Billie Joe Armstrong 

Miley proved a hit backstage again, this time with Jon Bon Jovi