"I am beyond thrilled to have my biggest sales week ever with my 31st album," the 52-year-old country singer said in a statement Wednesday. "To get to share it with all my friends on this duets project is icing on the cake."
The album's guests include Kenny Chesney, Kelly Clarkson, Ronnie Dunn (of Brooks & Dunn), Vince Gill, Don Henley, Faith Hill, Carole King, Rascal Flatts, LeAnn Rimes, Justin Timberlake and Trisha Yearwood.
Released Sept. 18, "Reba Duets" sold more than 300,000 copies in the first week -- more than double McEntire's previous first-week sales high of 124,000 with "It's Your Call" in 1992.
"When the consummate superstar gets her creative juices flowing, we all look like geniuses," Luke Lewis, chairman of the Universal Music Group Nashville, said in a statement.
During her 30-year career, McEntire has had many No. 1 hits including "Little Rock," "New Fool at an Old Game" and "The Heart Won't Lie."