Will.i.am Feat. Cody Wise

The original credits identify both performers as vocalists and writers, with will.i.am and Damien Leroy producing. A. R. Rahman and Keith Harris also appear among the credited writers, connecting the final song to a wider set of musical contributions than its two-name billing might suggest.

Wise’s delivery gives the record a more flexible melodic presence beside will.i.am’s clipped, rhythm-led phrases. The contrast is important because the instrumental is already full of sharp signals. A recognisable sung line gives the listener something continuous to follow through those changes.

The official May 2014 video gathers Vine, YouTube and Maker Studios performers into its sequence of comic appearances. That setting reflects the recording’s own approach: quick entrances, brief recognisable gestures and a refusal to let one scene last for too long.

The song remains coherent because the central vocal idea keeps returning. The production can change its density or punctuate a phrase with another sound, but the refrain re-establishes the same immediate identity. It’s My Birthday depends less on a long story than on the pleasure of seeing how many different ways a simple party signal can be delivered.