EXCLUSIVE: Amber Riley and Ricki Lake Fangirl Over Their 'Dreamgirls' Guest Roles on 'Crazy Ex-Girlfriend'!

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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.

"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."


MORE: 'Crazy Ex-Girlfriend' Star Rachel Bloom Proves She's the Absolute Best With Hilarious Golden Globes Speech

To say that Lake is a "fan" of the smash CW series would be a drastic understatement.

"I like to think that I'm the No. 1 fan," the 47-year-ol actress dished. "It's outrageous, it's crazy, she's so relatable and the songs are catchy. [Rebecca] is the everywoman, we all can relate to this character, and the fact that it's a musical comedy on television -- it's a dream for me as a viewer."

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"I think they're nailing it every week and I'm just happy to be a part of this episode," Lake added. "I would have mopped the floor to be a part of this. I would have done anything, and so they gave me this little dream sequence. It's a little mockiup on Dreamgirls -- I'm a dream ghost. I get to wear some crazy wig later, and I'm tickled to be here."

As for our other "dream ghost," Riley admitted she was having some serious McKinley High nostalgia while rehearsing for this musically-inclined guest role. "It's kind of like a flashback, but not as crazy though," the Wiz star said of her Glee past. "There's not as many people. But I [still] had to pre-record after I got the lyrics and learned the song, and when we were in rehearsal, I was remembering how I memorize the steps like before."


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Although neither of our dream ghosts have gone to Rebecca's extremes of traveling cross-country for a man, both Lake and Riley admitted that they have "absolutely" stalked an ex before.

"I still stalk people on Facebook!" Lake admitted. "I mean, I'm in a relationship but I still like see what people are up to. Yes, I do plenty of stalking, way too much, especially with social media these days."
"Oh yeah!" Riley agreed with a laugh. "We have Instagram and Facebook now, are you kidding me? I stalk my exes all the time."

"With Twitter, you can go crazy just seeing what the posts are about," Lake continued. "Even if you don't put your location on, you can still get a sense of what they did last night, who they were with last night, and so, yeah, I spend a lot of wasted time doing that kind of stuff."

Crazy Ex-Girlfriend airs Mondays at 8 p.m. ET/PT on The CW.