The voice of confident performer Jessie J filled the muddy fields of the Isle Of Wight Festival on Saturday as the raven-haired pop star took to the main stage for a crowd-pleasing performance.

Dressed in a laced black top that showed off her perfectly-toned stomach and a pair of faded jeans that were gaping from her thigh to her shins, the Price Tag singer wowed the mixed crowd of music fans with her impressive vocals and catchy tunes.

Most accustomed to working the stage with her dance moves, she told fans: "I can't stand still and I've never sung this song before or used a mic stand, but I'm just going to push myself," before showcasing her vocal talent with a rendition of Usher's emotional Climax.

It was enough to bring one girl to tears and the high-notes were pretty breathtaking, but the rest of the crowd were eager to hear the upbeat and feisty tunes she is better known for.

Sensing it was time to step it up a notch, she shouted "OK, now we can dance" and moved onto Luther Vandross's Never Too Much, which merged into her catchy album track Abracadabra - she was back to her swaggering and pouting self.

Screams rang out from the audience as she belted her touching ballad Who You Are, and by the end of the energetic set, she'd made some new fans, while pleasing her young loyal audience with festival-customised performances of her big hits Price Tag, Nobody's Perfect and Laserlight.

Proving she's better live than the radio, she bowed out with one of her sustained signature high notes - a long and loud Do-minoooo.

PHOTOS: Isle Of Wight performers...

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• Isle of Wight Festival - Day 3

  Eddie Vedder of Pearl Jam performs on the main stage as the headlining act on day 3 of The Isle of Wight Festival at Seaclose Park on June 23, 2012 in Newport, Isle of Wight. (Photo by Samir Hussein/Getty Images)

• Isle of Wight Festival - Day 3

  Tinnie Tempah performs on the main stage on day 3 of The Isle of Wight Festival at Seaclose Park on June 23, 2012 in Newport, Isle of Wight. (Photo by Samir Hussein/Getty Images)

• Isle of Wight Festival - Day 3

  Tinnie Tempah performs on the main stage on day 3 of The Isle of Wight Festival at Seaclose Park on June 23, 2012 in Newport, Isle of Wight. (Photo by Samir Hussein/Getty Images)

• Isle of Wight Festival - Day 3

  Suggs of Madenss performs on the main stage on day 3 of The Isle of Wight Festival at Seaclose Park on June 23, 2012 in Newport, Isle of Wight. (Photo by Samir Hussein/Getty Images)

• Isle of Wight Festival - Day 3

  Jessie J peforms on the main stage on day 3 of The Isle of Wight Festival at Seaclose Park on June 23, 2012 in Newport, Isle of Wight. (Photo by Samir Hussein/Getty Images)

• Isle of Wight Festival - Day 3

  Jessie J peforms on the main stage on day 3 of The Isle of Wight Festival at Seaclose Park on June 23, 2012 in Newport, Isle of Wight. (Photo by Samir Hussein/Getty Images)

• Isle of Wight Festival - Day 3

  Eddie Vedder of Pearl Jam performs on the main stage as the headlining act on day 3 of The Isle of Wight Festival at Seaclose Park on June 23, 2012 in Newport, Isle of Wight. (Photo by Samir Hussein/Getty Images)

• Isle of Wight Festival - Day 2

  Tom Petty of Tom Petty and the Heartbreakers performs on the main stage on day 2 of The Isle of Wight Festival at Seaclose Park on June 22, 2012 in Newport, Isle of Wight. (Photo by Samir Hussein/Getty Images)

• Isle of Wight Festival - Day 2

  Tom Petty of Tom Petty and the Heartbreakers performs on the main stage on day 2 of The Isle of Wight Festival at Seaclose Park on June 22, 2012 in Newport, Isle of Wight. (Photo by Samir Hussein/Getty Images)

• Isle of Wight Festival - Day 2

  Tom Petty of Tom Petty and the Heartbreakers performs on the main stage on day 2 of The Isle of Wight Festival at Seaclose Park on June 22, 2012 in Newport, Isle of Wight. (Photo by Samir Hussein/Getty Images)

• Isle of Wight Festival - Day 2

  Lana Del Rey performs in the Big Top on day 2 of The Isle of Wight Festival at Seaclose Park on June 22, 2012 in Newport, Isle of Wight. (Photo by Samir Hussein/Getty Images)

• Isle of Wight Festival - Day 2

  Lana Del Rey performs in the Big Top on day 2 of The Isle of Wight Festival at Seaclose Park on June 22, 2012 in Newport, Isle of Wight. (Photo by Samir Hussein/Getty Images)

• Isle of Wight Festival - Day 2

  Example performs on the main stage on day 2 of The Isle of Wight Festival at Seaclose Park on June 22, 2012 in Newport, Isle of Wight. (Photo by Samir Hussein/Getty Images)

• Isle of Wight Festival - Day 2

  Example performs on the main stage on day 2 of The Isle of Wight Festival at Seaclose Park on June 22, 2012 in Newport, Isle of Wight. (Photo by Samir Hussein/Getty Images)

• Isle of Wight Festival - Day 2

  Charlie Fink of Noah and the Whale performs on the main stage on day 2 of The Isle of Wight Festival at Seaclose Park on June 22, 2012 in Newport, Isle of Wight. (Photo by Samir Hussein/Getty Images)

• Isle of Wight Festival - Day 2

  Charlie Fink of Noah and the Whale performs on the main stage on day 2 of The Isle of Wight Festival at Seaclose Park on June 22, 2012 in Newport, Isle of Wight. (Photo by Samir Hussein/Getty Images)

• Isle of Wight Festival - Day 4

  NEWPORT, UNITED KINGDOM - JUNE 24: Bruce Springsteen and the E Street Band headline the main stage on day 4 of The Isle of Wight Festival at Seaclose Park on June 24, 2012 in Newport, Isle of Wight. (Photo by Samir Hussein/Getty Images)

• Isle of Wight Festival - Day 4

  NEWPORT, UNITED KINGDOM - JUNE 24: Bruce Springsteen and the E Street Band headline the main stage on day 4 of The Isle of Wight Festival at Seaclose Park on June 24, 2012 in Newport, Isle of Wight. (Photo by Samir Hussein/Getty Images)

• Isle of Wight Festival - Day 4

  NEWPORT, UNITED KINGDOM - JUNE 24: Bruce Springsteen and the E Street Band headline the main stage on day 4 of The Isle of Wight Festival at Seaclose Park on June 24, 2012 in Newport, Isle of Wight. (Photo by Samir Hussein/Getty Images)

• Isle of Wight Festival - Day 4

  NEWPORT, UNITED KINGDOM - JUNE 24: Noel Gallagher of Noel Gallagher's High Flying Birds performs on the main stage on day 4 of The Isle of Wight Festival at Seaclose Park on June 24, 2012 in Newport, Isle of Wight. (Photo by Samir Hussein/Getty Images)

• Isle of Wight Festival - Day 4

  NEWPORT, UNITED KINGDOM - JUNE 24: Noel Gallagher of Noel Gallagher's High Flying Birds performs on the main stage on day 4 of The Isle of Wight Festival at Seaclose Park on June 24, 2012 in Newport, Isle of Wight. (Photo by Samir Hussein/Getty Images)