EA, MTV and Harmonix have announced The Beatles: Rock Band - Two Microphone Pack for PS3, which bundles the game plus two SingStar microphones for £49.99.
Note: that's two wired microphones; it may be worth considering two wireless SingStar microphones instead, as they cost only £29.99 at ShopTo and are infinitely snazzier.
All this microphone talk draws attention to the unique three-part harmonies in The Beatles: Rock Band. That feature is one of the many reasons we dolloped 9/10 on the historic music game earlier this month.
The other reasons we've smeared mercilessly throughout our Beatles: Rock Band review.