Learning about service

I can't even count all the different times mom had us practicing "Yankee Doodle" or some other group number to sing at one event or another...sometimes for money, and sometimes for service. A good friend of ours in our ward was having a surprise 50th birthday party for her sister-in-law with a theme of Hawaii 5-0 and asked if the girlies would dance for it. I of course said yes, and couldn't wait for the girls to have another opportunity to serve others, while at the same time, practicing their dancing. Now, we only know 2 numbers, and realized that for the Tahitian number they know we can no longer perform it because all the costumes are way too small. So, it's time to update the costumes and I think it's time to learn a new number. Anyone out there know a tradional Tongan one? The girls are ready!