If Putin is into Puerto Rican pop, he's in for a treat. The tournament's official song, "live It Up," has showed up at World Cup stadiums about as often as Putin himself. It will be showcased Sunday when Will Smith joins singers Nicky Jam and Era Istrefi in performing it during the closing ceremony. The song is innocuous enough, but that doesn't mean some controversy couldn't crop up. Though the three avoided anything sensitive during their news conference this week, Istrefi has ruffled feathers in the past on a topic that caused problems earlier in the tournament: An ethnic Albanian from Kosovo, she upset some conservative Serbs last year when she shot a music video inside an Orthodox Church. FIFA fined several Swiss players, also ethnic Albanians, who made pro-Albania symbols with their hands in a comeback win over Serbia in the group stage.