In terms of warm-up acts, you couldn't ask for much more than Tinie Tempah, or 'Tinie mother f***ing Tempah' as he introduced himself to last night's crowd at Camden's Roundhouse. Despite many of the spectators knowing only two of his songs (Pass Out and latest hit Frisky), Tinie really got the audience going, and before we knew it everyone was chanting along merrily to 'I say Tinie, you say Tempah!', getting involved in some synchronized swaying and even singing the chorus to his future single Invincible, despite the fact we'd never actually heard it before. 

In his short but energetic set Tinie covered material both old and new. After getting everyone hot and sweaty with Frisky, the crowd were introduced to his latest song Written in the Stars - a tune with strong echoes of Rihanna's Umbrella that's set to be released this August. Another highlight was his hip-hop cover of Bad Romance by Lady Gaga, which sampled Dizzee Rascal's Bonkers - perhaps to show there are no hard feelings after Dizz and James Corden beat him to number one with their World Cup single. 

In the grand finale, Tinie whipped off his top and got the crowd riled up with a fantastic performance of Pass Out, during which the level of enthusiasm in the audience was matched only by the amount of white boxer on show as Tinie's jeans slipped further and further towards the floor. Only a true star can get away with that.

After such a great performance, Tinie Tempah was definitely a hard act to follow, but beatboxer Faith SFX more than lived up to the challenge. The London-born performer came on for a ten minute warm-up before Plan B's session, and completely wowed the crowd with his incredible talent. It wasn't just a beat that he created, but a whole piece of music, with vocals, sound effects and crazily low basslines. At one point, he even closed his mouth and held the microphone up to his throat for a short rendition of Reel 2 Reel's I Like To Move It. All in all, some seriously impressive stuff.

Unfortunately, that is more than can be said for Plan B when he finally made it to the stage. Who knows what went on in the soundcheck, but as soon as Plan B began performing his first track, Writing's On The Wall, it became obvious that we weren't actually going to hear much of the vocal over the musical accompaniment. This, along with the fact Plan B looked generally a bit p***ed off and spent most of the time when he wasn't singing with his back to the audience towelling sweat off his face, meant the first part of performance was a pretty lacklustre affair.

Indeed nothing really stood out as Plan B ploughed through the first nine songs of his set, most of which came from his latest album, The Defamation of Strickland Banks. Even his recent hit She Said and a cover of Paulo Nutini's Coming Up Easy failed to make much impression on the audience, and Plan B did little to ingratiate them with his mumbled utterances in between. So disappointing was the first part of Plan B's performance that, when he'd finished what was supposedly his 'last song' and exited the stage, it was hard to add much gusto to the calls of 'We want more' started up by his more diehard fans.

Luckily for Plan B he did come back for more, and in doing so went a long way in redeeming himself for part one of his performance. While the soulful tracks he'd previously been singing were what made Plan B famous, his encore suggested that it was the more experimental music - the stuff he was making before he decided to embrace the necessities of commercial success - that really made the artist tick. There was so much more passion from the performer, and a far greater connection with the audience, as he rapped and sang his way through a medley including Dr Dre's The Next Episode, a brilliant dupstep version of Kiss From A Rose by Seal and Take Me To The Sweetshop by Doctor P. The return of Faith SFX to the stage and outstanding performances from Plan B's six-piece band helped fuel the audience's excitement, and it was with renewed buoyancy that Plan B performed his final track, Stay Too Long, to a great reception from the crowd.

While Plan B might have been the headline act for this episode of the iTunes Festival, he certainly wasn't the biggest star of the night. If we're talking talent, then it was definitely Faith SFX who left the crowd flabbergasted, and in terms of showmanship, Plan B was simply dwarfed by the Tinie one.