Ellie performed her chart-topping hits including 'Starry Eyed' and 'I Need Your Love' in front of the crowd at the Roundhouse on Sunday night (22 September).
Ellie, who recently celebrated her first number one last month with 'Burn', rocked the stage in a black crop top and printed pants with braces.
She teamed her outfit with white Dr. Martens boots and kept her flowing blonde locks loose, which made for a hell-raising performance when she jumped up and down on stage and played the drums!
It seems Ellie was slightly overwhelmed with her performance, admitting after the show: "What an incredible show... Was a real moment for me x."
She later added: "Such a great night! Thank you to iTunes and to the wonderful audience last night, I truly had the best time x."
Fans seemed to be equally pleased as they took to Twitter to praise the 26-year-old singer.
One fan tweeted: "Catching up on the @elliegoulding set from the iTunes Fest. An absolute corker of a show," while another said, "Totally amazed and speechless with your performance on iTunes @elliegoulding." Another fan simply described her performance as "captivating".
Ellie's music showcase was all about her voice and took the limelight of her reported brief romance with Ed Sheeran. The pair sparked rumours last month at the MTV Music Video Awards in New York, when they were caught on camera holding hands.
Although Ellie denied anything was going on, recently Ed appeared to have confessed to a radio station that he did actually have a brief fling with the singer!
Ellie's career has soared since she released her debut studio album, Lights, in 2010 and her credibility as an artist is continuing to grow too. This morning, the singer excitedly revealed that her single 'Don't Say a Word' has been sampled on Drake and Jay-Z's collaborative track 'Pound Cake'.
"Honestly been trying to play it cool but Drake and Jay-Z sampled me on Pound Cake," she told fans on Twitter.
Download the free official iTunes Festival app to see the line-up, apply for tickets, and watch the shows live or on repeat for a limited time. Visit: www.itunesfestival.com.
Watch Ellie's video for 'Burn' below: