Zac Efron swung by Jimmy Kimmel Live! last night to chat about his new movie, The Paperboy, which is out today. The picture apparently required Zac to show a bit of skin — he confessed to spending a lot of time on set wearing just underpants! Zac stars in the film with Nicole Kidman and Matthew McConaughey. Matthew shared some advice with Zac, and apparently offered serious words about how going shirtless can affect one's career.