I think I might have worked out Orson's bright idea, and it's not the "I'll just disappear" one they sing about: Orson are going to act the part of a big-time rock band until everyone takes it for granted they have become one.

But the problem they are going to have, if tonight's performance was anything to go by, is that with just one album to their name and only two or three stand-out songs, it is going to be hard to maintain the rockstar swagger for long.

Despite lacking material, they have no shortage of experience.

The five-piece band spent years honing their catchy, upbeat style in the clubs of their native Los Angeles before being signed up.

The stage skills they learnt in that time are evident.

They bounded dramatically onto the stage sporting the requisite Noughties rocker hats and hairdos, individually lapping up the applause from a sell-out audience before launching into an energetic rendition of Happiness, taken from the recently-released album Bright Idea.

The fans clapped along to the opener and the band's energy levels never waned throughout a posturing performance.

An awkward sound set-up meant frontman Jason Pebworth's voice was barely distinguishable above the guitars and drums on many songs, including Downtown, Last Night and The Okay Song. Many sounded too similar as a result.

Predictably, the moments of clarity in the performance came with the two chart hits, Bright Idea, in the middle of the set, and No Tomorrow, an encore. Both were rapturously received by the crowd, which bounced along ,singing the familiar choruses.

With more material under their belt it may be a different story for Orson. For now they seem best suited to the Summer festival season they will soon immerse themselves in. Given a four or five song set they will be able to use their repertoire to great effect.

The band is named after a sandwich, which in turn was named after Hollywood legend Orson Welles.

Perhaps a bit more meat on less thickly-sliced bread would give them more of a bite.