The producers asked Cheryl to step in as the new coach.
She gained wider recognition for appearing in a series of music videos by Sia.
Will Shia get his own Sia wig? The American dancer Maddie Ziegler is best known for her time in the dance reality show Dance Moms.
This last fight was so big that Abby ended up taking Kelly to court, but any charges were dropped.
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She is also doing some modeling work and was in New York Fashion Week.