 Complete the following phrase:  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 RB. 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 RB Gospel Album at the 