Billboard rates TV's best and worst musical performances.
Alabama Shakes, Saturday Night Live (Feb. 28)
Brittany Howard is such a captivating frontwoman, she could sing a software terms and conditions agreement and raise goose bumps. In this case, she had "Don't Wanna Fight" -- a new song with a great guitar hook reminiscent of The Who's "Eminence Front" -- and from her Joplin-esque opening to the song's full-tilt climax, she slayed.
In the Valley Below, Conan (Feb. 23)