Gracyanne Jacobina Barbosa Vieira is a Brazilian fitness model and Carnaval dancer. Barbosa who had appeared on the cover of the Brazilian Playboy's February 2007 issue, also posed for the cover of Revista Sexy December 2011 issue .

In 2012, photos of Barbosa squatting were uploaded to social media, followed by a workout video. Barbosa's ostensible squat weight (around 450 lbs) caused "an uproar on the bodybuilding forums for months", leading to debates at popular websites such as Bodybuilding.com on the authenticity of the weight plates used by her. On 18 May 2012, Barbosa married pagode and samba singer Belo who was formerly married to Viviane Araújo, another famous rainha de bateria. The ceremony was held at Candelária Church in Rio de Janeiro.