Martha Heredia Rivas (born February 1, 1991) is a Dominican singer and the winner of the fourth and last season of the television program Latin American Idol. Heredia wanted to be known artistically as La Baby (The Baby), notwithstanding this, she has rarely been referred in this way.

At 18, Heredia traveled San José, Costa Rica to audition for the fourth season of Latin American Idol. She did well on her audition and later traveled to Argentina, where she was amongst the top performers of a Latin American Idol workshop. Her next test was to earn the most votes out of the 12 performers on the show. For two months, Heredia was very successful all the way up to the final between Heredia and Eduardo Aguirre of Costa Rica, where she performed with Franco de Vita. On December 10, 2009, after receiving more than 50% of the total number of votes, Martha Heredia became the new Latin American Ido