Stellar pulsations are found in many different types of stars. Usually, the regions in the Hertzsprung-Russell diagram (HRD) that are populated by pulsating stars are connected with instability strips or domains. A star within such a domain is particularly sensitive to small perturbations of its equilibrium state. Recently, a new group of pulsating stars settled. These are the blue supergiants (BSGs), i.e., massive stars that have evolved from O and B-type main sequence progenitors. In addition, indications for possible pulsations in a B[e] star have been found. Both groups of stars are therefore worth being studied in more detail.