I've still got Lego Star Wars III that came with my hard drive unplayed, so I'm not bothering with these.
Rock Band 3 is a bargain at £8.99/1080MSP until New Year's Eve. I bought it today and a few extra songs to sing with my Lips microphone; Foreigner, Queen and Maroon 5 mostly.
Has anyone tried the Karaoke on Xbox Music? I'd love to know if it's any good and if it does more than just show you the lyrics.
EDIT: Never mind, I just read the US OXM's rather scathing review of the Xbox Music Karaoke, so I'll stick with RB3.