Your sister is wrong. It's totally not a country music song. Even in the manner you sang it:

Don’t go back to Rockvillllllllllllllle
Don’t go back to Rockvillllllllllllllle
Don’t go back to Rockvillllllllllllllle

(beat)

And waste another year

And to my oriental homie in D.C:

Josie's on a vacation far away
Come around and talk it over
So many things that I'd like to say
You know I like my girls a little bit older
I just wanna use your love tonight
I don't wanna lose your love tonight