Zac Efron down! We repeat, teenybopper heartthrob Zac Efron is down! The High School Musical star was rushed to hospital today to have his appendix removed. Efron is recovering nicely, and has agreed to sign the mostly useless, prone-to-rupturing tissue for an eBay celebrity-organ auction, where it's expected to fetch a large sum earmarked for The Children's Appendicitis Fund. [TMZ]