For the fifth time, Lambert has been nominated for Entertainer of the Year. She's the only female in the category this year. Lambert, the ex-wife of The Voice coach Blake Shelton, is also up for Female Vocalist of the Year.
Underwood and Musgraves are up against Lambert in the Female Vocalist of the Year category.
Musgraves has also been nominated for Video of the Year with "Biscuits."
Raelynn has been nominated for New Female Vocalist of the Year.
Urban is up for Vocal Event of the Year for "Raise Em' Up" featuring Eric Church. Lambert has scored another nomination in this category for her song "Smokin' and Drinkin'" with Little Big Town.
The 2016 ACM Awards is set to air Sunday, April 3 at 8PM ET/PT on CBS.