The heading reminds me of the song with the lyrics 'Who likes to Boogie?' LOL.
Anyway, back to the game. I brought it today from Argos for £30 as it was offer. (It came with a free microphone which plugs into the USB port on the back of the Wii) As soon as I loaded the game there is dance tutorial which was okay but I was more interested in the singing! 
In the Karaoke mode, you can only sing a few songs. It has a mixture from the old to the new tunes from 'We Are Family' to 'Fergalicious'. To earn the points, your voice has to match the pitch of the bars on the screen, a bit like 'Singstar'. The more in tune you are to the song, the more points you get arranging from Bronze, Silver and Gold. And with these points you can buy things including new clothes for your character on this particular game (you don't use Mii's!) new stages/backgrounds to dance/sing on and more songs!
I have yet to do the dancing part but luckily for me you don't actually do dancing, just flick the Wii Renote and Nunchuck! 
