Mashups? We’ll give you mashups! How about The Beatles: Rock Band spliced with Sony’s SingStar karaoke brand for PlayStation 3? It’s happened already: a Beatles Rock Band SingStar bundle is being sold in the UK, offering the game with two of Sony’s SingStar microphones. It’s selling in the UK for £49.99, but US games blogs are already up in arms about the fact that there are no plans to launch it in the US.