More True and False

Which of the following statements is the lie?

1. Since toddlerhood, my hair has never been shorter than my shoulders.

2. I have one appendix, two wisdom teeth, and no tonsils.

3. My first dog "sang" on command.

4. I went an entire year without eating meat.

5. My ancestry is (to my knowledge) entirely European.

6. I didn't eat macaroni and cheese from a box until I was ten years old.

7. When I was little, my favorite color was yellow; I never liked pink/purple.

So which one is it? First to guess right wins 8 gold stars.