Osinachi Joseph (née Kalu) popularly known by the mononym Sinach, is a Nigerian born gospel music singer, songwriter, and senior worship leader at Believers' Loveworld International. She is known globally for several gospel hits songs which include, "Way Maker", "I Know Who I Am", "Great Are You Lord", "Rejoice", "He Did It Again", "Precious Jesus", "The Name of Jesus", "This Is my Season", "Awesome God", "For This", "I Stand Amazed", "Simply Devoted" and "Jesus is Alive". In 2017, she was inducted into the Bethlehem Hall of Fame, joining Dwayne Johnson, Pope Benedict XVI and a host of other internationally recognized celebrities on the listed.
On 7 March 2019, Sinach became the first Gospel singer from Nigeria to obtain over 100 million views of a single video on YouTube, and the third Nigerian to achieve that feat, next to Davido and Yemi Alade, who achieved the same feat in December, 2018. She achieved this with her song, Way Maker.
In September 2019, Sinach became the first Gospel Artist from Africa to tour India, headlining concerts with several thousands in attendance.