"What U Do 2 Me" is a song by Boomkat, released as the second and final single taken from their debut album Boomkatalog.One (2003). This was also their final song released with DreamWorks Records due to their departure. It was only released as a DJ single and did not achieve the same success as their previous single, "The Wreckoning". A music video was shot, and Kellin's vocals were not used, instead Taryn sang all Kellin's lines.