After just beating the Special World, I can confidently say that this is the best 3D Mario game. The Galaxy series was really good, but I didn't have any desire to keep playing to collect all the stars. This game I actually got all the Star Coins and everything.
To resurrect this old topic, just bought this game today due to the 2012's 2011 award - and it is is amazing. I was really skeptical initially as I really don't care about Mario and am bored of the NSMB series, but this is the best Mario game I have played in a long time. I am blown away by it's great quality in all departments.
Long story short, my niece wants to do karaoke. What's the best karaoke game for Xbox 360? Preferably one that's not too expensive, comes with a microphone, and has enough current pop songs (by the real artists preferably) to be enjoyed by younger kids.