From the very short-lived WB paranormal dramedy (that's almost redundant, isn't it?), Dead Last (08/14/2001 - 12/08/2001). This rock trio finds the "Amulet of Sauryn" which gives them the very Sixth Sense-y ability to see and talk to dead people.
So, in addition to rocking out, they are press-ganged into post-life counselor jobs, helping the dead sort out their unfinished business.
Lineup: bassist Jane Cahill (Sara Downing), drummer Scotty Sallback (Tyler Labine), guitarist & singer Vaughn Parrish (Kett Turton) and manager Dennis Budny (Wayne Pére).
I'm sure the show probably had some more fake bands in it, somewhere.