Breaking news on how Zac Efron's butt feels: Zac's 17 Again co-star Nicole Sullivan got to squeeze his cheeks when they filmed a sketch for Funnyordie.com together.
She says on NYPost.com's PopWrap blog, "I can describe it exactly: Two large, firm grapefruits. It is the tightest little butt I have ever seen in my life. I was shocked because he's a slight guy -- but he is in shape! ... All other booties pale in comparison!
