Anonymous wrote:I'm taking my 11-year-old, with earplugs.
Sexy lyrics have been around for-EVER. I remember happily singing "Squeeze Box" by the Who with my little friends ("she goes in and out and in and out" is repeated about a hundred times). We didn't know what the words meant and didn't care. If your DC asks, that's one thing--but if not, why even open that can of worms.
I'm in my late 40s, have sung along to the chorus of Squeezebox many times ("Momma's got a squeezebox daddy never sleeps at night")... and this thread is the FIRST time I ever realized it's not about an accordion!! LOL! To be fair though, I saw Prince and Vanity 6 on the 1999 tour and was at Studio 54 at 15 (my parents had no idea), so I'm hardly sheltered. But did not know that about Squeezebox!
As to OPs original question, I don't know Katy Perry's stuff enough, I play my 5 yr old the video for "Roar" but that's it. Tried to check out the "Last Friday Night" video because she's dressed like a nerd with braces and big glasses, but quickly had to turn that video off when she wakes up next to a nekkid jock right at the beginning... but I have a hunch it's not that bad. 9 may be a little young, but 10 or 11 seems about right for that.
Whatever you do, INSIST ON EAR PROTECTION (ear plugs or noise-cancelling headphones!).