Thankful is the debut studio album by American duo Mary Mary. It was released on May 2, 2000, through Columbia Records in the United States. Chiefly produced by Warryn Campbell, the album is gospel music with stylings of contemporary R&amp;B. It produced the smash crossover hit "Shackles (Praise You)", which reached the top ten in seven countries and the single "I Sings", which was also a significant hit. "Thankful" established Mary Mary as one of the leading artists in contemporary Christian music, and won the duo the Grammy Award for Best Contemporary R&amp;B Gospel Album at the 43rd awards ceremony as well as a Dove Award, a Lady of Soul Award, and a Stellar Award.