Jem Aswad Senior Music EditorH.E.R. and Ingrid Andress will join the star-studded performer lineup for the 2021 CMT Awards while Anthony Mackie, Busy Philipps, Iliza Shlesinger and Michael Strahan have been added as presenters, the network announced Monday (June 7).The two artists will duet with previously announced performers: Fast-rising R&B star H.E.R.