I'm guessing on the title. Anyone know who does this song commercially? Google wasn't immediately helpful, but I've also got a few work-related distractions to blame for the lack of research. On the whole, a pretty entertaining uptempo number from the kids. As Marcos suggests at the end of this clip, they were indeed great. Job well done by Holly & the gang.

UPDATE: Reggie, from the comments, points out that the song is "My Number One" from the recent Hillsong Kids CD.