Mary Mary is an American gospel music duo, consisting of sisters Erica Monique Campbell ( born April 29, 1972) and Trecina "Tina" Evette Campbell (born May 1, 1975), and are often credited for broadening the fan base of contemporary gospel in the 2000s by introducing elements of soul music and hip hop.

The duo was subsequently signed to Columbia Records/C2 Records and decided to perform under the name Mary Mary, honoring Mary, the mother of Jesus and Mary Magdalene. They were first gospel act to record for the industry giant Columbia Records since Tramaine Hawkins in the mid-1990s.

Their first single, "Shackles (Praise You)" became a croosver hit, being popular with gospel, R&B, and pop audiences. It was a Top 10 R&B and Top 40 pop hit, and peaked at #28 on the Billboard Hot 100 chart. It became the first gospel song in five years to crack the R&B top ten and gained wide exposure on the MTV video cable channel.

The album was a huge success because it offered a younger, hipper version of gospel that audiences could relate to. Their first album,Thankful (Mary Mary Album) in May 2000, which would go on to win the Grammy Award for Best Contemporary Soul Gospel Album, and a second single, "I Sings". Peaking at #1 on the Gospel album chart and at #59 of the overall Top 200 chart, Thankful was certified Platinum for sales of 1 million copies in the USA.

Both singles were also hits in the UK and Europe, and to this day remain popular with Christian youths in the US, Latin America, and Europe.