One Direction, Ed Sheeran and Lorde: So much talent at the iHeartRadio music festival 

One Direction, Ed Sheeran and Lorde: So much talent at the iHeartRadio music festival

We can\'t pick our favourite moment from Saturday night\'s performances - there\'s just too many to choose from

Star studded: One Direction, Iggy Azalea and Ed Sheeran were among the festival's line up

It was hard to know how iHeartRadio would top the first night of their music festival after huge performances from the likes of Taylor Swift, Ariana Grande and Nicki Minaj.

But with One Direction kicking off Saturday night\'s show, they were certainly off to a good start.

The boyband took to the stage for the second night of the event and had the audience enchanted with a rendition of their hit song Little Things.

Crowd pleasers: The One Direction boys had the audience swooning

Looking super suave, the boys showed off their impressive collection of arm tattoos and quiffed hair.

Despite their achingly cool vibe, there was one awkward moment when Harry Styles attempted to crowd surf - but failed spectacularly after just sort of throwing himself onto the front row.

The band have been in Las Vegas for the past week as they celebrated Niall\'s 21st birthday in the famous casinos.

"We have actually lost all our money, we don\'t want to talk about it," Liam joked, while Niall admitted that he might never leave the desert city.

Ed Sheeran was also at the festival to sing what the crowds thought was a cover of Macklemore\'s Same Love - until Ed invited the rapper up on stage with the pair treating audiences to an amazing collaboration.

They then shared a hug before Ed launched into one of his oldest tracks, A-Team.

Shapely: Iggy\'s clashing mini dress showed off her toned pins

Iggy Azalea also performed on Saturday, wearing a super-short, colourful mini dress that showed off the singer\'s toned pins.

The event, held at the MGM Grand Garden Arena in Las Vegas was hosted superstar DJ Calvin Harris, who got the audience on their feet with his fast-paced DJ set.

Scottish producer Calvin then gave fans a special treat as he debuted his new single, Blame, with John Newman providing live vocals for the track, alongside some pretty extravagant pyrotechnics.

Spirit fingers: Calvin debuts his brand new single Blame

And as if all this excitement wasn\'t enough, crowds were also treated to some of Lorde\'s best dance moves as she hit the stage for her 15-minute set.

The Royals singer opted for big, wild hair and an animal print khaki two piece, teamed with chunky leather boots - perfect for throwing all those crazy shapes.

Check out the best pictures from the event in our gallery below..

One Direction's Zayn Malik: "Russell Brand gave me family planning advice" - revelations in new book

The band\'s new autobiography will finally give fans an insight into the boys\' lives and their meteoric rise to fame

Jennifer Lawrence and Chris Martin are 'moving in together', says close pal

The couple are head over heels in love and friends of the pair say The Hunger Games actress has moved into his £10million Malibu home

Taylor Swift thinks she's a rock star as she falls to her knees on stage at iHeartRadio music festival

When you play roulette, blackjack and slots at Mirror Casino

Kim Kardashian nude photos leaked: Live updates as pictures showing more stars naked appear online

Jennifer Lawrence nude photos: More than 60 snaps of the star 'naked and in lingerie' have now leaked

X Factor 2014: Chloe Jasmine ex-boyfriend dishes on her secret booze and drugs fuelled past

Lady Gaga shows her cheeky side as she puts up her own album posters in Athens

Mariah Carey 'frequently speaking' to director Brett Ratner - a shoulder to cry on after split

Heidi Klum stuns as she joins fashion royalty on the red carpet for amfAR charity gala

Keyshia Cole's 'victim' revealed: Woman was 'attacked' after the singer confronted her at producer's apartment

If you think there’s nothing funny about unemployment, you haven't watched The Job Lot

Married Shane Richie spotted 'kissing blonde' after TV awards bash - EastEnders star outside London hotel

Kim Kardashian nude pictures leaked: Naked selfies appearing to show reality star appear online

Kim Kardashian nude photos leaked: Reaction as images appearing to show reality star naked appear online

Hayden Panettiere 'nude photos' leaked as the actress becomes the latest victim of the hacking scandal

Jennifer Lawrence NUDE photos leaked: Star among 101 others 'victim to mass hacker'

Concerts like Wacken, T in the Park and even the Rio Carnival!

Manchester City vs Chelsea LIVE: All the action from the Etihad plus Everton vs Palace updates

Tottenham 0-1 West Brom: James Morrison heads Baggies to victory at White Hart Lane

Leicester vs Manchester United LIVE: All the action from the King Power plus Spurs vs West Brom updates

Lewis Hamilton goes top of F1 Drivers' Championship with Singapore Grand Prix victory

'Tipsy' hunter fights off killer crocodile by POKING it in the eye

Thailand beach murders: Police to trace anyone who had relationship with backpackers before brutal killings

Dennis Rodman denies rumours of meeting with ISIS leaders after parody report goes viral

Fire kills 25 pedigree dogs in devastating blaze at private breeder's home

Leicester City 5-3 Manchester United: Louis van Gaal's men given a second-half mauling by the Foxes