Mariana Machado Valadão (born 3 July 1984) is a Brazilian Christian singer, songwriter, worship pastor and television presenter. Mariana Valadão is the daughter of the Pastor Márcio Valadão and Renata Valadão, pastors and founders of the Lagoinha Baptist Church. Mariana is the youngest sister of André Valadão and Ana Paula Valadão. She was part of the worship ministry Diante do Trono, led by her sister Ana Paula Valadão. Her first solo album was "Mariana Valadão", recorded in 2008.