(digitalspy.co.uk) - Justin Timberlake has admitted that he finds playing golf more nerve-wracking than performing a live show.The popstar, who took up the sport five years ago, told the Daily Record that he struggles to play when he has an audience.He said: "I can sing in front of half a million people without a problem, but I can't hit a golf ball straight in front of about 20."My dad always played and when I hit the first ball off a tee, I was hooked. It became this thing I could do outdoors when I was on tour, and I love being outside."Timberlake added that playing golf makes him feel "less like a machine, even when there are ten guys with cameras around".