Osinachi Joseph (nee Kalu) popularly known by the mononym Sinach, is a Nigerian 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".
On the 7th of March 2019, Sinach became the first Gospel singer from Nigeria to record over 100 million views on 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, WayMaker which was released December 2015 on the music sharing and streaming platform, Youtube. 
In 2019, Sinach graced the list of the top 100 Most Reputable People on earth, by Reputation Poll International, listed alongside Oprah Winfrey, Queen Elizabeth II, Pope Francis, Evang. Reinhard Bonnke, Prince Harry and Meghan, Strive Masiyiwa and 93 others. She was one of the five Nigerians who made it to the list.