Stomp stomp, she’s arrived! Jessie J ensured she put her very own stamp on the iTunes Festival at Camden's Roundhouse with an infectious live show.

Feeling: Gently easing us into the evening was the raspy vocals of singer-songwriter, James Bay. Perhaps not the most obvious support choice for Jessie J, yet within minutes he had the entire crowd captivated, generating a sea of swaying arms that were to engulf The Roundhouse for the remainder of his set.

Before we knew it, the lights faded and a 30 second countdown clock appeared on the stage, it was time for J-J-J-J-Jessie J.

[related]The Look: LEGS! VERY LONG LEGS! Jessie J hit the stage looking fierce as always in a black, spotty mesh shirt, tucked into a pair of teeny-tiny sequin hotpants, (which she later told the crowd she got these for a fiver from Primark, what a woman!)

Tunes: Jessie J certainly didn’t disappoint her fans with the chosen setlist. It was very much a hit-after-hit affair, bursting into her set with Sexy Lady, Domino and the ever popular It’s My Party, in which hundreds of balloons fell from the ceiling, only to flood the stage and require several iTunes Festival crew members to dash on stage after the song and get popping... “We didn’t really think this through, did we?!” Jessie joked to the crowd. She also performed debut trackDo It Like A Dude (with a of N*ggas In Paris twist), smash-hit Price Tag and closed with Bang Bang (minus Ariana and Nicki).

Special Guests: Oh, no one special, just THE ONE AND ONLY TINIE TEMPAH! Tinie arrived on stage completely unexpectedly during Sweet Talker, a song from Jessie J’s new album. Met by an almighty roar from the overwhelmed gig-goers, it’s safe to say that his surprise appearance went down a treat. (He may have only been on stage for 30 seconds, but it was a GREAT 30 seconds, ok?)

Banter: The ability to speak to her audience in a very approachable, relatable and funny way seems to come naturally to Jessie J. She may be a mega-famous popstar with amazing pins, but she comes across very grounded, full of jokes, and always happy to thank her devoted fans for being there. Basically, she’s one of the good guys.

Sweat Factor: If you weren’t simultaneously jumping around and dripping with sweat during Laserlight, then you were definitely doing something wrong.

Summary: With faultless vocals and seemingly enough energy to run the London Marathon threetimes over, Jessie J completely dazzled a full-to-the-brim Roundhouse.With her new album Sweet Talker set to be released on October 13, we think it’s best to prepare yourself for a Jessie J domination.

By Steph Harland @MTVUK

Set List:

1. Sexy Lady
2. Domino
3. It's My Party
4. Sweet Talker(withTinie Tempah)
5. Nobody's Perfect
6. Wild
7. LaserLight
8. Keep Us Together
9. Big White Room
10.You’re Lost I'm Found
11.You Don't Really Know Me
12.Who You Are
13.Do It Like a Dude(with snippet of N*ggas in Paris)
14.Ain't Been Done
15.Burnin' Up
16.Price Tag
17.Bang Bang