May 8, 2014 3:48 am Zac Efron Dishes on Seth Rogen's Pranks on “The Tonight Show” Zac Efron says he took off his shirt when Seth Rogen asked him to while shooting “Neighbors” until he realized that the “Knocked Up” star was only giving him a hard time. US & World Videos 0:48 Target to lower prices on about 5,000 basic goods 0:47 WATCH: Comet fragment lights up the sky in Portugal 1:58 ICC seeking arrest warrants for Israeli and Hamas leaders 1:43 World reacts to death of Iran's president 1:07 Cargo ship that crashed into Baltimore bridge moving back to port