FITNESS magazines and Web sites love to ask readers about their favorite workout music while presenting their playlists or suggestions from celebrities. Self.com features the “ ’80s cardio playlist,” which includes the short-shorts video classic “Wake Me Up Before You Go-Go” by Wham! On Fitnessmagazine.com, the singer Rihanna reveals her favorite workout songs — immodestly recommending four of her own for “when you have to pick up the pace on the treadmill.” more of this NYTimes article.