We went to "family kariokee" one night and we had 9 to 12 year old girls singing "slutty" songs about sex and or wanting sex (Spears, Agulara, Madonna, etc). Didn't think is was family oriented or appropriate. Didn't stay too long.
Disney knows that there songs aren't "cool" with the tweener and early teen set (even though they have numerous great songs with catchy toons - I have over 21 hours of Disney music on my pc - from my own CD collection that I have at home)