'Free Lil Wayne!' Em shouted before launching into 'No Love' at T in the Park festival.By James Montgomery Eminem performs at the T in the Park music festival on Saturday Photo: Andrew Milligan/ AP He took the stage nearly 45 minutes late — allegedly due to "laser pen fears" — but Eminem more than made up for the delay with a fiery headlining performance on Saturday at the T in the Park festival in Scotland. Em's made just a handful of live appearances over the past year (his last U.S.