Sorry, artists, making music using iPhone apps is SO last-quarter. It’s all about crowbarring Twitter references into your lyrics now, epitomised by Mistah F.A.B.’s Hit Me On Twitter.”I follow you, and you follow me, we can kick it, like one of the homies,” run the lyrics. “First it was BlackPlanet, then MySpace, then Facebook took over my place. Whoa, now I”m stuck on Twitter…”The bar has been set. Low, admittedly. But set nonetheless.