Kelly Osbourne: Samantha Harris Leaving DWTS "Makes Me So Sad"

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Samantha Harris won't be back on Dancing With the Stars this year -- and last season's third-place finisher Kelly Osbourne couldn't be more bummed out.

"I just heard about Samantha Harris leaving dwts this makes me so sad," Osbourne, 25, Twittered Jan. 29. "It wont be the same without her. I wish her so much luck go sam! :)"

Last week, Harris announced she wouldn't be returning to cohost the series alongside Tom Bergeron when its tenth season premieres March 22.

Harris tells UsMagazine.com of her departure, "I've loved every aspect of my time at Dancing With the Stars. I've lived and breathed this incredible show for the last eight seasons, making lifelong friends along the way. It has given me so many wonderful opportunities."

The host, who joined DWTS in 2006 (replacing Lisa Canning), will assume "expanded responsibilities on The Insider," she tells Us. Her DWTS replacement has not yet been named.

Tell Us: Who should replace Samantha Harris on DWTS?