Enjoy these Smash previews from the episode “Chemistry” which airs tonight on NBC.

SMASH preview -Ivy’s Can’t Take It – Ivy finally gives Derek a piece of her mind.

SMASH preview – History is Made at Night – Ivy and Michael duet in this romantic number.

SMASH preview – Ivy Loses It – Everyone’s stunned when Ivy loses her voice.

SMASH preview – Shake Your Stuff – Karen gets the party started with a performance of “Shake It Out.”

Image courtesy of NBC. Smash stars Megan Hilty, Katharine McPhee, Christian Borle.