This has been posted at £14.99 before as a collect at store only. The price has now dropped to £9.99 and it's also available for home delivery for an additional £5.95.
I can confirm this is the bundle that includes the mics.
Download loads of tunes from just £0.99 per track from SingStore
Blu-ray disc contains 30 original tracks, plus loads to download from SingStore
Upload pics, videos and performances to the in-game community My SingStar Online
Personalise your own playlists to suit the type of SingStar you are
Customisable new menu skins and backgrounds, plus new voice effects and wallpapers to make it your SingStar