(ET ONLINE) – Ricki Lake and Amber Riley are flying high on this week’s all-new Crazy Ex-Girlfriend!

Only ET was on the set during filming of tonight’s Motown-inspired episode, and the show’s creator and star, Rachel Bloom, spilled the exclusive scoop on how she landed these dreamy guest stars.

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Crazy Ex-Girlfriend -- "Josh Has No Idea Where I Am" -- Image Number: CEG115a_0374.jpg -- Pictured: Rachel Bloom as Rebecca -- Photo: Scott Everett White/The CW -- © 2016 The CW Network, LLC. All rights reserved.

Rachel Bloom as Rebecca (credit: Scott Everett White/The CW)

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“Ricki was just a fan, which is the most flattering thing ever,” the Golden Globe winner gushed to ET. “And I believe Amber was a fan too. This is a kickass Motown number and we just needed the most kickass people that we could think of, and it’s going to be so fun.”

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Read more at ETOnline.com

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