Ugandan dance group Ghetto Kids are celebrating another milestone after appearing at the football World Cup final half-time show on Sunday - a life-changing experience summed up by 10-year-old Sierra as "very, very, very, very, very good". Despite critics bemoaning the addition of a Superbowl-style show, external to the beautiful game's biggest event, the children's performance alongside global stars Burna Boy and Shakira was viewed by many millions around the world. She and 11-year-old Josephine are still on a high, after their World Cup appearance midway through the game that saw Spain beat Argentina at the MetLife Stadium in New Jersey. "I saw Messi and Lamine Yamal!" says Josephine about the two team's stars - Argentinian captain Lionel Messi and Spain's teenage winger Yamal.