Pitch Perfect 3 includes as part of the cast the actress and singer-songwriter who appeared on the first and second seasons of what television show?
Pitch Perfect 3:  A sequel to "Pitch Perfect 2" (2015) and the third and final installment in the "Pitch Perfect" trilogy, the film will star Anna Kendrick, Anna Camp, Rebel Wilson, Brittany Snow, Hailee Steinfeld, Alexis Knapp, Ester Dean, Hana Mae Lee, Chrissie Fit, Kelley Jakle and Shelley Regner, with Elizabeth Banks and John Michael Higgins. Kelley Jakle:  She is also known for her appearances on the first and second seasons of "The Sing-Off" in 2009 and 2010.
i don't know