Does having too many interests decrease chances of top universities? - HYP, Stanford, Caltech, MIT..

<p>@gibby- hello! I am interested in applying to Harvard. I am in junior year and my academic record is great. However I havent been taking part in many extracurricular activities in my time in high school. I am looking to change this and i have this year and 2 months of summer. The only extra-curriculars I have so far are: Volunteering at a special needs school, and volunteering at a charity art exhibition and a charity fun fair. I am also an active member of the school choir. Do you think its too late to start doing more activities, and if not, do you think that even if I do, I wouldnt be a good applicant? </p>