I have no idea if I'm being unreasonable or I'm just out of touch!
My older dds are both Brownies and as a pack they have been working towards their Hostess badge. This involved serving tea to all the mums last week and clearing up afterwards. All well and good so far.
However they also had to entertain us and this entailed singing a song called California Girls. I had never heard of this song before (nor had dds) but they both knew it contained something about sex and I got a few awkward questions from them. I think they stopped singing before the sex bit but they still knew about it.
Have just googled the song lyrics - it's by Katy Perry and I don't think it's suitable for 7-10 year old girls to sing, especially not at Brownies. But maybe I'm just out of touch.
On the very few occasions that I've heard Brownies singing age-inappropriate songs, they have been songs from CDs that their parents have bought for them. Brownies are supposed to choose their own activities for badges, but sometimes that choice can be guided (no pun intended). I'd be amazed if the Brownie leaders had chosen that song, but perhaps you could clarify that with them and suggest a suitable alternative. It won't be a successful concert if all the parents are choking on their tea!
I can only presume that the song was chosen by one of the girls (who then shared the lyrics with the others?). I doubt that many Brownie leaders would have suggested something like that, but I can imagine them not looking too closely at the lyrics once it was chosen.