Top 10(ish) Songs to sing to (pre teens)

I often find that sing-offs of the "main sections" (not always the chorus) of songs works as a great way to get school groups going, I tend to do a boys V girls sing-off.

Does anyone else do this and what songs do you find work.

Here are some of mine...

Boys
1. We will rock you - Queen
2. Can we fix it - Bob the builder
3. I like to move it - Reel 2 Reel
4. Monster - The Automatic

Girls
1. We are never getting back together - Taylor Swift
2. Barbie girl - Aqua
3. Mamma mia - ABBA
4. Hey Baby - DJ Otzi

Would love to get ideas for some others :o)