In 2008, Magalhães won an Emmy Award for Outstanding Achievement in Costume Design for her work as the artistic director of the Opening Ceremony of the Pan American Games in 2007.
In 1971 Magalhães began to participate in Rio's carnival by cooperating with the group led by Fernando Pamplona and Arlindo Rodrigues, which worked in the samba school Salgueiro and had as its members Mary Augusta, Lycia Lacerda and Joaozinho Trinta among others.
In 1982 Magalhães and Lacerda worked as carnival designers for the first time with Império Serrano, where they performed the famous (and winner) plot "Bumbum Paticumbum Prugurundum".
The year 1988 marked the first carnival in which Magalhães participated alone, again with Estacio, where she developed the theme "The Oxgoat" (O boi dá bode).
- runner-up in 1993), "Catherine de Medicis in the court of the Tupinambôs and Tabajères" (Catarina De Médicis Na Corte Dos Tupinambôs e Tabajeres, the champion in 1994), "Better a donkey to carry me around than a camel to knock me down ... there in Ceará" (Mais vale um jegue que me carregue do que um camelo que me derrube… lá no Ceará!, champion in 1995), "Leopoldina, Empress of Brazil" (Imperatriz Leopoldinense honrosamente apresenta: Leopoldina, a Imperatriz do Brasil, runner-up in 1996), "Mr Cabral was the one who, on 22 April, two months after Carnival, discovered Brazil" (Quem Descobriu O Brasil, Foi Seu Cabral, No Dia 22 De Abril, Dois Meses Depois Do Carnaval, champion in 2000), "Breazail" (Breazail, 5th place in 2004), "A crazy fabulistic confusion" (Uma delirante confusão fabulística, 4th place in 2005) and "John and the Marias" (João e Marias - 6th place in 2008), among others, establishing herself, with five titles won, as the greatest champion of the Sambadrome and one of the most important contemporary Brazilian artists.