We had the best time writing this post on behalf of our sponsor, Bing. Read on and you'll know why. Also, you may get Celine Dion stuck in your head after this and for that we apologize. 
Best guaranteed crowd pleasing karaoke song
Best karaoke song after a few too many tequilas
Find More: Helpful Services, Tech, CMP-Style
Comment Policy: In an attempt to maintain a positive, productive, supportive community at Cool Mom Picks, we have the right to reject comments that are off-topic, self-promotional, inflammatory, or that bum us out for any reason. But you wouldn't do that anyway - you're too cool.
How can you NOT love MMM Bop? I totally sing that in my car all the time. I'm a not so closeted Hanson fan. And yeah, anything from Neil Diamond repertoire will make me leave!
What? No Delta Dawn? (THAT is a room clearer)
Free Fallin' gets the bar going.
And Independence Day by Martina McBride is good for an almost-pro.
Sweet Caroline - really depends on the crowd. 70's kids? Sing along. 80's-90's kids? Clearing out.
Was just seearching for new ideas for my upcoming Halloween karaoke party and came upon this post. I agree with most of the above, but I also like to do a lot of rap, as it surprises everyone (given my extreme whiteness).